INTRODUCTION 

Eighty percent of the wine consumed in the United States is produced in California, the nation’s top wine-producing state. In 49 of the 53 counties, there are many vineyards that are being farmed. Currently, the Alcohol and Tobacco Tax and Trade department has approved 266 AVAs. In California, there are more than half of these AVAs. Investigate these areas and the dates when they received formal AVA certification.

DATES LIST

1/28/1981: On this day, the Napa Valley wine region was established. As of January 1981, Napa Valley was officially acknowledged as California’s first wine area. The AVA covers 225300 acres, nearly the entire area of Napa County, including 45000 acres of vines. Chardonnay and Cabernet Sauvignon are its primary grapes. Five percent of California’s wine is produced in Napa Valley, one of the most diversified regions. Since its founding, the AVA has expanded to encompass 16 different subregions.

8/5/1981: On this day, Santa Maria Valley AVA was established. In the farthest north of Santa Barbara County is the Santa Maria Valley AVA. It is the first AVA in the county to be acknowledged. Chardonnay and Pinot Noir thrive in the AVA’s diverse soils, which include maritime effects from the Pacific Ocean. One of the dynamically expanding areas that benefit from a variety of microclimates is the AVA. It produces some of the top chardonnays and pinot noirs in the nation using grapes that are nuanced, delicious, and exceptionally balanced.

9/23/1981: On this day, San Pasquale Valley AVA was established. AVA stands for American Viticultural Area, and it is located in northern San Diego County, California. It can be found in Southern California’s San Pasqual Valley of the Peninsular Ranges. When the AVA was established in 1981, San Pasqual Valley was the fourth wine region to receive the designation. San Diego, Poway, and Escondido have encroached on the AVA, resulting in relatively high land values but restricted viticultural potential.

11/19/1981: On this day, the Guenoc Valley wine region was established. Guenoc Valley AVA is located in Lake County, 24 km north of Calistoga town. The AVA spans approximately 4500 acres with 504 acres of planted vineyards. Guenoc Valley AVA is located on the elevated flanks of the Mayacamas mountains at 700-1500ft above sea level. The AVA’s terroir is suitable for Cabernet Sauvignon, Merlot, Cabernet Blanc, and Syrah, among other varietals.

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Source: https://wine1percent.com/tag/mcdowell-valley-ava/

12/4/1981: On this day, the McDowell Valley wine region was established. McDowell Valley AVA is located in the southeastern region of Mendocino County, spanning 540 acres. The AVA enjoys a cooler climate compared to surrounding regions, excellent for cultivating Syrah and Rhone vines. The AVA contains some of the oldest Rhone vines in California and high-quality Syrah wine. The AVA sits at the foot of Mayacamas mountains, approximately 1000 ft above sea level. The Russian River provides a cooling influence creating a Mediterranean climate excellent for viticulture.

12/4/1981: On this day, Santa Cruz Mountains wine region was established. Santa Cruz Mountains is one of the largest AVAs in California, encompassing three counties, Santa Cruz, Santa Clara, and San Mateo. It was established in 1981 and is defined by its mountainous terrain. The appellation’s key grapes include Pinot Noir, Chardonnay, Cabernet Sauvignon, and Merlot.

12/4/1981: On this day, the Sonoma Valley wine region was established. Sonoma Valley AVA was legally established. Sonoma Valley AVA consists of unique terroir and is the oldest winemaking region in Sonoma County. The region boasts a strategic location that contributes to its unique terroir adding to the quality of wine produced. Sonoma Valley is located between Mayacamas Mountains and Sonoma mountains. These mountains protect the appellation from cool breezes rising from the Pacific Ocean in the west and excessive rainfall from the east. The regions boost diverse fertile soils like many other AVAs in the region.

 5/12/1982: On this day, the Edna Valley wine region was established. Edna Valley AVA is located in San Luis Obispo County. It is the oldest AVA to be recognized in the county. Edna Valley AVA has a rich history dating back to the q9th century when Spanish missionaries planted vineyards and made wine win the county. The rich history has allowed the AVA to produce elegant Chardonnays and Pinot Noirs.

 6/4/1982: On this day, the Lime Kiln Valley wine region was established. Lime Kiln Valley is a sub-AVA of Cienega Valley AVA, located in San Benito County. It is one of the smallest appellations in California, with only one wine estate. The AVA’s Key Grape is Mourvèdre. Other varietals include Zinfandel and Syrah.

6/14/1982: On this day, the Chalone Valley wine region was established. Chalone Valley AVA spans through Sa Benito and Monterey counties in Gabilan Mountains. The AVA is characterized by unique granite and limestone soils found only in this appellation. Varietals that do well in this AVA include Pinot Blanc, Pinot Noir, Chardonnay, Syrah, and Chenin Blanc.

 8/16/1982: On this day, the Paicines wine region was established. Paicines AVA is a sub-appellation of San Benito AVA in San Benito County. Established in 1982, the AVA is home to premium quality wines, including Chardonnay, Merlot, and Cabernet Sauvignon. Most of its grapes are supplied outside the AVA. Paicines experiences warmer temperatures than other AVAs in San Benito County since its lowly elevated. Despite this, it receives cooling winds from Monterey Bay, essential for quality grapes.

 8/19/1982: On this day, the Cienega Valley wine region was established. Cienega Valley AVA is located in the western part of San Benito County, elevated at approximately 1100 feet above sea level. The appellation is positioned along the San Andreas fault and exhibits granite and sandstone soils to the east and granite and limestone soils to the west. The AVA’s terroir is suitable for red wines, which are common in their wineries, including Zinfandel, Pinot Noir, Cabernet Sauvignon, and Riesling.

 9/1/1982: On this day, the Livermore Valley wine region was established. Livermore Valley was one of the AVAs officially recognized when the AVA system was first established. The AVA boasts well-drained soils, preventing vines’ vigor and increasing grape flavor concentration. The AVA is located in San Fransico Bay appellation and is named after Robert Livermore, the forts person to plant grapes in the region.

California Wine Regions, California Wine Regions by Date

Source: https://www.winemag.com/2020/03/02/explore-livermore-valley-wine-country/

11/24/1982: On this day, the Suisun Valley wine region was established. Suisun Valley AVA is one of the oldest AVAs in California, located in the western part of Solano County; it’s part of the North Coast AVA encompassing 15000 acres of land. The AVA produces several grape varietals but is popularly known for Merlot, Cabernet Sauvignon, and Petite Sirah.

 12/14/1982: On this day, the Carmel Valley wine region was established. Carmel valley AVA is located in the western part of Monterey County, encompassing 19000 acres, of which 300 are planted with vineyards. The AVA experiences dramatic temperature changes, extending grape ripening and growing season. Besides, it boasts sandy loam soils and a unique climate ideal for full-bodied wines. Bordeaux-style varietals, Cabernet Sauvignon, and Merlot are king.

 12/28/1982: On this day, the California Shenandoah Valley wine region was established.  Californian Shenandoah Valley is an AVA in El Dorado County, lowly elevated (1400ft) and boasting decomposed granite and sandy loam soils. Due to its low elevation, it is not affected by mountainous climates, making it suitable for Italian varietals, including Zinfandel, Primitivo, Sangiovese, and Barbera.

12/29/1982: On this day, the Solano County Green Valley wine region was established. Solano County Green Valley AVA is located in Solano County, Southeast of the Napa Valley AVA. The AVA boasts 800 acres of planted vineyards, and its key grapes are Merlot, Cabernet Sauvignon, and Syrah.

4/15/1983: On this day, the Arroyo Seco wine region was established. Arroyo Seco is a Monterey AVA, one of the smallest in California, encompassing 18240 acres. The AVA enjoys unique aspects of the Arroyo Seco Creek. Besides, it boasts a unique terroir suitable for Bordeaux and Rhone-style varietals. Despite its small size, the AVA has made a name for itself for producing distinct Riesling and Chardonnay.

4/15/1983: On this day, the Cole Ranch wine region was established. Cole Ranch is a Mendocino County AVA and the smallest in the United States. The 60-acre AVA is well known for its Riesling, Pinot Noir, Merlot, and Cabernet Sauvignon. Cole Ranch is elevated between 1400 and 1600 ft above sea level, experiencing mesoclimate, making it wetter and cooler than surrounding regions. As a result, its grapes boast balanced acidity, distinct from surrounding regions.

4/15/ 1983: On this day, Santa Ynez Valley wine region was established. Santa Ynez Valley AVA is one of the favorite destinations in Santa Barbara County. It has a majority of the wineries in the county. The AVA’s 42000 acres span from the west where influences from the Pacific Ocean are felt to the east, a higher ground protecting some vineyards from marine influences. As a result, several varietals can be planted in this AVA, ranging from Chardonnay to Cabernet Sauvignon to Merlot. Currently, 7500 acres are under vines.

California Wine Regions, California Wine Regions by Date

Source: https://naturalwine.com/folk-machine-chenin-blanc-merritt-island-clarksburg/

5/17/1983: On this day, the Merritt Island wine region was established. Merritt Island AVA is part of the larger Clarksburg AVA in Yolo County. It is surrounded by the Sacramento River and the Sutter and Elk streams. Petite Sirah, Chardonnay, and Chenin Blanc are the major varietals planted on the 5000-acre island.

8/4/1983: On this day, the Dry Creek Valley wine region was established. Dry Creek Valley AVA was legally founded. It’s one of the smallest in the region, extending 16 miles long and 2 miles wide. Its soils are rocky and drain incredibly well, effectively stressing grapes later in the growing season; this also adds to varietal character. Sauvignon Blanc and Zinfandel perform well in this AVA. Dry Creek Valley is one of the densely planted regions; it produces some of the most revered Cabernet Sauvignons and Zinfandels despite its size. The AVA boasts more than 8000 acres of planted vineyards and 63 wineries.

8/18/1983: On this day, Anderson Valley AVA was formed. Anderson Valley is an AVA at the center of Anderson Valley in Mendocino County. The 57600-acre AVA has 2457 acres under vines, of which the majority is Pinot Noir. The AVA is also famous for producing high-quality sparkling wines.

8/18/1983: On this day, Los Carneros wine region was established. The appellation was officially recognized. Carneros is a premier wine-growing region known for its elegant Pinot Noirs, Chardonnays, and Sparkling wines. The AVA is the first to be recognized based on its climatic conditions rather than political boundaries. The appellation is one of the AVA located in the southern region of Sonoma, straddling the Sonoma and Napa region. The AVA’s cool climate allows chardonnays and other cool-climate varietals to flourish. Regular breezes and fog from San Pablo Bay regularly offset the sun’s warmth, leading to the production of Burgundian-style wines. Besides, the climate allows for the production of spectacular sparkling wines. It boasts more than 6000 vineyard acres and 22 wineries.

8/18/1983: On this day, Willow Creek AVA was formed. Willow Creek AVA is located in northern California in the Humboldt and Trinity counties. The AVA’s features are similar to Rhone Valley in France. Therefore, the AVA boasts a Mediterranean climate. Besides, it experiences diurnal temperatures leading to an extended ripening period. The AVA has a handful of vineyards and no commercial bonded winery. Its key grapes include Merlot, Syrah Chardonnay, and Cabernet Sauvignon.

8/24/1983: On this day, York Mountain AVA was recognized. York Mountain AVA is part of the greater Central coast AVA in SLO County. It’s fairly elevated at 1500ft above sea level, giving it a cool maritime climate suitable for producing its key grapes, Cabernet Sauvignon, Pinot Noir, and Syrah. Besides, the AVA experiences extended grape ripening and growing season due to diurnal temperature shifts.

9/21/1983: On this day, North Coast AVA was established. North Coast AVA is one of the largest AVAs in California, encompassing several wine regions in six counties with more than three million acres. The AVA comprises several smaller appellations. Vignerons from this AVA mostly identify their wines with sub-appellations names. North Coast AVA is only used for wines made from blends of different sub-appellations in this AVA.

10/4/1983: On this day, Fiddletown AVA was recognized. Fiddletown is an AVA in Amador County. The first vignerons settled here in the 1850s during the Gold Rush. The AVA is known for old-grown Rhone varietals, including Grenache, Syrah, and Zinfandel. The AVA boasts low-yielding vines planted at fairly elevated heights than most vineyards in Amador County, leading to the production of concentrated fruit wines.

10/4/1984: On this day, Paso Robles AVA was established. Paso Robles AVA is located in San Luis Obispo County, comprising 11 sub-appellations. Since its establishment, winemaking has flourished, leading to the establishment of over 200 bonded wineries. Its key grapes include Zinfandel, Cabernet Sauvignon, Rhone blends, and Cal-Italians.

10/13/1983: On this day,  El Dorado  AVA was established. El Dorado is an AVA in El Dorado County, located at the foothills of the Sierra Nevada Mountains; it’s a sub-AVA of Sierra Foothills AVA. The AVA is elevated above 2000ft and therefore receives more sunlight and cooling effects from mountain breezes. Wines produced in this AVA are characterized by depth and density.

10/13/1983: On this day, the Potter Valley wine region was recognizedPotter Valley is a Mendocino County AVA located east of Redwood Valley and fairly elevated than the surrounding regions. The AVA experiences diurnal temperatures and its terroir are suitable for Sauvignon Blanc, Pinot, Noir, Riesling, and Chardonnay.

10/21/1983: On this day, Chalk Hill AVA was formed. The AVA was legally established on 21 October 1983. Chalk Hill derives its name from its chalk-like soils. The AVA is located in the Russian River Valley, but its diverse characteristics, including warmer climate, ancient volcanic ash, and chalky soils, differentiate it from other AVAs in the Russian River Valley. Chalk Hill AVA is also known for its mineral-rich wines. Its dominant varietals include Chardonnay and Sauvignon Blanc. The AVA comprises 1495 vineyard acres and five wineries “located on the western slopes of the Mayacamas mountains.”

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Source: https://www.celebritycruises.com/blog/california-wine-regions

 10/21/1983: On this day, the Knights Valley wine region was legally recognized.  Knights Valley is located between Napa Valley and Alexander Valley AVA borders, right at the base of Mt. St. Helena. Varietals that flourish in this AVA include Cabernet Sauvignon, Sauvignon Blanc, Chardonnay, and Bordeaux varietals. The subregion is the most remote among Sonoma wine sub-regions with rugged roads. It also boasts better wines and scenery. Its long sunny days and rich volcanic soils make Cabernet Sauvignon the dominant varietal in the AVA.

21st October 1983: On this day,  Russian River Valley was legally recognized as an AVA. Russian River Valley AVA is famous for producing one of the best Pinot Noir and Chardonnay wines. Its cool climate and coastal fog from the Pacific Ocean differentiate it from most AVAs in the Sonoma region. The cool climate allows grapes’ slow ripening, leading to balanced acidity and complexity. The evening fog drops temperature up to 40 degrees compared to daytime temperature. The diurnal temperature changes allow for full flavor maturity and extended growing season. In 2005 the AVA expanded after considering previously overlooked fog regions. Currently, the AVA boasts more than 13000 acres and more than 90 wineries.

21st November 1983: On this day,  Green Valley of the Russian River AVA was established. At its establishment, the appellation was known as Sonoma County Green Valley. However, on 23 April 2007, it changed its name as it sought to associate with the revered name, Russian River Valley. The AVA is “located in the southwestern part of the Russian River Valley,” surrounding Occidental, Forestville, and Sebastopol. Green Valley of the Russian River valley boasts consistent terroir demonstrated in its wine’s consistent flavor. Besides, the AVA is close to the Pacific Ocean and experiences marine effects at close-range. As a result, it is one of the coolest AVAs in the Sonoma region.

12/30/1983: On this day, Howell Mountain AVA was created. It was among the first appellations created in Napa Valley, founded on 30 December 1983. The AVA is elevated 600-2600 feet above sea level. As a result, it is above the fog line and does not experience fog. Instead, the appellation experiences a lot of sunlight which characterizes its key grapes, Cabernet Sauvignon, Merlot, and Zinfandel. Pre-prohibition, the AVA was popular for its Zinfandel wine. The appellation boasts volcanic soils in its 600 acres of planted vineyards. Due to its altitude, the appellation receives cool breezes from the Pacific Ocean compared to high temperatures at the valley’s base.

 1/23/1984: On this day, Clarksburg AVA was established. Clarksburg AVA is one of the AVAs that spans more than one county, nestled in Sacramento waterways. The AVA’s major growing area is in Yolo County, extending into Solano and Sacramento counties. Clarksburg is fairly flat, boating fertile silt and clay soils. The AVA is known for aromatic white wines and Chenin Blanc.

 3/12/1984: On this day, Pacheco Pass AVA was recognized. Pacheco Pass AVA’s growing areas extend between San Benito and Santa Clara counties. It was established in 1984, and its key grapes are Merlot, Chardonnay, Zinfandel, and Black Muscat.

 5/8/1984: On this day, Clear Lake was recognized. Clear Lake AVA is located in Lake County, elevated between 1300 and 1500 ft above sea level. High elevation ensures the AVA experiences long sunlight hours, leading to thicker grape skins, high tannins, and phenolic content. Several varietals flourish here, including Muscat, Chardonnay, Sauvignon Blanc, Cabernet Sauvignon, and Zinfandel.

 6/15/1984: On this day, Mendocino AVA was established. Mendocino AVA is part of the larger North Coast AVA. The appellation encompasses the entire Mendocino County and smaller appellations. The AVA is popularly known for its two distinct climate zones separated by Mendocino Ridge. Its terroir thus is suitable for a wide range of varietals. Currently, the AVA boasts more than 550 vineyards and 50 wineries.

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Source: https://www.goldmedalwineclub.com/wine-region/mendocino-ava

 6/15/1984: On this day, Monterey AVA was established. Monterey AVA forms the original appellation of Monterey County established in 1984. However, with years of viticulture, distinct microclimates have been identified, leading to the establishment of eight sub-appellation. It is one of the large AVAs in California. Its northern part is considered cool, and most vineyards are planted with Pinot Noir and Riesling. The southern part is warmer, and Bordeaux varietals are dominant.

10/24/1984: On this day, the Alexander Valley AVA was legally recognized. The subregion is located north of the Sonoma wine region surrounding Geyserville. The AVA is an inland growing region that boasts the Cabernet Sauvignon varietal. The AVA is located along the Russian River, whose fog cools the AVA’s temperatures at night, and its climate allows grapes to preserve acidity. The region’s vineyards are mostly family-owned. Despite Cabernet Sauvignon being king in this AVA, it also produces elegant Chardonnay, Sauvignon Blanc, and rare wines, including Sangiovese. The AVA boasts more than 15000 vineyard acres and 43 wineries.

1/23/1985: On this day, Sonoma Mountain AVA was legally recognized. The AVA is elevated 2400 feet above sea level. Its mountainous terrain boasts of rocky soils and extended sunny periods. Despite long sunlight exposure, grapes can retain acidity and experience cool temperatures overnight. As a result, the ripening process is slowed. Interestingly, some varietals not synonymous with this terroir do well in this AVA. They include Pinot Noir, Chardonnay, Cabernet Sauvignon, and Zinfandel. However, Cabernet Sauvignons are the dominant varietal. The AVA was formally established on 23 January 1985. It boasts more than 600 vineyard acres and three wineries.

5/17/1985: On this day, Northern Sonoma AVA was recognized. Northern Sonoma AVA is expansive, encompassing several other AVAs, including Russian River Valley, Chalk Hill, Dry Creek Valley, Knights Valley, Green Valley, and Alexander Valley. The lake and Mendocino County form the AVA’s boundaries. The AVA was legally recognized on 17 May 1985.

 7/30/1985: On this day, North Yuba AVA was legally established. North Yuba AVA is located in Yuba County in the Sierra Nevada Mountains. The AVA boasts volcanic soils resulting from its topography. Key varietals produced in this AVA include Syrah, Viognier, Cabernet Sauvignon, and Roussanne.

 11/21/1985: On this day, the South Coast wine region was established. South Coast is also one of the biggest AVAs, encompassing five counties in southern California, including San Bernadino, San Diego, Orange, Los Angeles, and Riverside. The AVA consists of smaller appellations sharing the same ecology of warmer climates cooled by coastal breezes. The terroir is suitable for the Zinfandel varietal. However, other varietals such as Cabernet Sauvignon and Sauvignon Blanc are also produced.

 10/24/1985: On this day, Central Coast AVA was established. Central Coast is a large AVA comprising several sub-AVAs spanning from San Fransisco Bay to Santa Barbara. It’s one of the largest, with 90300 acres of planted vineyards. Its large size also represents 15 percent of the total wine grapes produced in California.

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Source: https://en.wikipedia.org/wiki/Central_Coast_AVA

2/13/1986: On this day, Lodi AVA was recognized. The AVA is one of the fascinating AVAs in California. It has more than100000acres of land under vines and produces more wine than Napa and Sonoma combined. The AVA was established in 1986 and had some of the oldest Zinfandel vines in California. Apart from Zinfandel, other grapes that are planted here include Tempranillo, Albarino, Cabernet Franc, Petite Sirah, and Viognier.

6/11/1987: On this day, the Sonoma Coast AVA was legally recognized. Sonoma Coast AVA is the largest of the AVAs in the Sonoma region, “extending from San Pablo Bay to the border with Mendocino.” The AVA receives heavy rainfall compared to other AVAs in the region and experiences breezes from the Pacific Ocean. Despite this, the AVA boats warmer temperatures to ripen the grapes. Its terroir is best suited for Chardonnay and Pinot Noir, which are undoubtedly stars of the AVA.

 10/5/1987: On this day, San Benito AVA was established. San Benito AVA, located in San Benito County, is nestled among the Diablo and Gabilan Mountain ranges. The AVA is home to several small-sized appellations in California; it has a warm climate cooled by Gabilan Mountains breezes. These breezes make the AVA cooler than Napa Valley. Grapes produced in this AVA include Chardonnay, Syrah, Tempranillo, Grenache, and Barbera.

11/18/1987: On this day, Sierra Foothills  AVA was recognized.  As the name suggests, this AVA is located at the foothills of the Sierra Nevada mountains. It is one of the largest (2.6 million acres), extending from Mariposa County in the south to Yuba County in the north. The AVA’s key grapes include Syrah, Zinfandel, and Barbera.

 12/9/1987: On this day, Ben Lomond Mountain AVA was recognized. As the name suggests, this AVA boasts a mountainous terroir. It is located in the western part of the Santa Cruz Mountains in Santa Cruz County. It is elevated up to approximately 2600ft above sea level removing it from the fog influences of the Pacific Ocean. Long sunlight hours and cool mountainous breezes ensure extended ripening and growing season. Grapes from this AVA are age worth and exhibit excellent minerality.

11/30/1988: On this day, Wild Horse AVA was recognized. Wild Horse Valley AVA is located close to San Pablo Bay, allowing it to experience the cooling effects of the fog and breezes. It was founded on 30 November 1988. The AVA has two distinct regions; the western part is moderately elevated and experiences fog and breeze from the bay area. Wild Horse Valley AVA is elevated 600-1900 feet above sea level. The slopy terroir protects the eastern part, making it warmer than the western part. However, the appellation is one of the coolest among the Napa subregions, with Chardonnay and Pinot Noir as key grapes.

1/27/1989: On this day, Stags Lead District wine region was established. This appellation is home to California’s historic wineries. The appellation hosts the Fay Vineyard, which produced grape juice to produce wine that won the 1976 Paris blind wine tasting competition. Interestingly, it is also the first appellation recognized due to its distinctive soils. Stags Leap District AVA comprises majorly volcanic and river sediment soils. Despite being relatively smaller, the appellation boasts 1200acres of planted vineyards. The key grape in this subregion is Cabernet Sauvignon.

 3/28/1989: On this day, Santa Clara Valley AVA was established. Santa Clara Valley is a large AVA encompassing more than 330000 acres with 1500 acres and vines. The AVA is located in Santa Clara County and boasts diverse soils ranging from granite to limestone-based and may contain near-perfect minerality. The AVA is known for its premium Cabernet Sauvignon and Zinfandel wines. However, the AVA has recently adopted the ‘Silicon Valley’ name due to its superior technology.

 1/4/1990: On this day, Arroyo Grande Valley AVA was established. Arroyo Grande Valley AVA is a sub-appellation of the Central Coast AVA located in San Luis Obispo County. The AVA is known for its cool climate, suitable for producing Pinot Noir and Chardonnay. Besides, Zinfandel and Syrah flourish in higher elevations where ocean fog does not reach. Its soils consist of majorly calcareous deposits, limestone with alluvial loams. Excellent drainage and shallow soils lead to strongly concentrated flavors in wines.

California Wine Regions, California Wine Regions by Date

Source: https://www.cawineclub.com/blog/little-known-avas-and-what-makes-them-special-edna-valley/

 2/20/1990: On this day, Mt. Veeder AVA was legally recognized. Mt. Veeder AVA was established on 20 February 1990, located in the Mayacamas mountains. The AVA boasts 1000 acres of planted vineyards, elevated 500-2600 feet above sea level. Its unique terroir gives its wine a ‘briary’ taste. Besides, it experiences cool to moderate temperatures and is elevated such that most vineyards are above the fog line. As a result, it experiences warmer nights and cooler days than most AVAs on the valley’s floor. Key Varietals include Cabernet Sauvignon, Merlot, Zinfandel, and Chardonnay.

 11/15/1990: On this day, Mt. Harlan AVA was recognized Mt. Harlan is an AVA located in Gabilan Mountains in San Benito County. The AVA’s terroir leads to low yields and wines with concentrated flavors. The 7447-acre AVA has 100a acres of planted vineyards, and its key grapes are Pinot Noir, Chardonnay, Aligote, and Viognier.

 11/15/1990: On this day, the San Ysidro District wine region was established. San Ysidro District is a sub-appellation of Santa Clara Valley AVA located in Santa Clara County. The AVA is characterized by cooler climates than other AVAs in the county. The AVA boasts of clay and sandy loam soils. Its key grape is Merlot, although it also produces Pinot Noir and Chardonnay.

 10/18/1991: On this day, Benmore Valley AVA was recognized. Benmore Valley AVA is located in the southwestern part of Lake County, elevated between 2400 and 2700ft above sea level. The AVA is cooler than the neighboring regions and boasts alluvial loam soils. Its grape of choice is Chardonnay.

 1/22/1992: On this day, Atlas Peak AVA was established. The AVA encompasses the hillside terroir and has the rockiest soil of the Napa Valley AVAs. The AVA is elevated 760 -2600 feet above sea level. Its high altitude means it is mostly windy than the valley floor AVAs. The appellation comprises 1500 acres of planted vineyards. Besides, its high altitude limits fog and breezes from San Pablo Bay. Key varietals in this AVA are Cabernet Franc, Cabernet Sauvignon, and Merlot. Malbec, and Petit Verdot.

5/15/1992: On this day, Santa Lucia Highlands wine region was established. Santa Lucia Highlands is located in Monterey County and is famed for producing high-quality Pinot Noir and Chardonnay. The 22000-acre AVA has 5750 acres under vines and is elevated to 2330 ft above sea level.

 5/13/1993: On this day, Dunnigan Hills AVA was recognized.  Dunnigan Hills AVA is located in the northwestern part of Yolo County. The appellation experiences a Mediterranean climate suitable for producing bright and full-bodied wines. Its key varietals are Chardonnay, Syrah, and Tempranillo.

California Wine Regions, California Wine Regions by Date

Source: https://www.wineaccess.com/catalog/2018-robert-keenan-winery-merlot-napa-valley_ad891c37-5210-496e-a0cc-011612713f20/

 5/13/1993: On this day, the Spring Mountain District wine region was established. The AVA has grown popular due to its red varietals. It is also elevated and does not experience fog from San Pablo Bay like other appellations down the valley. In addition, its elevation allows it to warm faster in the morning and experience warmer temperatures in the evening. Spring Mountain District AVA boasts 1000 acres of planted vineyards and 30 wineries. The appellation produces mostly red wine, and its key grapes are Cabernet Sauvignon and Merlot.

 7/2/1993: Oakville AVA was established. Oakville AVA was established in 1993, centered around Oakville town, and boasts sandy and gravelly soils. The AVA is elevated 500 feet above sea level and boasts 5000 acres of planted vineyards. The region’s warm climate supports the growth of Cabernet Sauvignon, Sauvignon Blanc, Merlot, and Cabernet Franc varietals. The appellation’s wines are among the most sought after in the world.

 7/2/1993: On this day, Rutherford AVA was established. The appellation has gravel loam soils with volcanic deposits that make its wine stand out from other subregions. Besides, the appellation is located at the widest point of the valley, receiving much of the radiant exposure annually. The appellation is elevated 600 feet above sea level and spans 6550 acres with Cabernet Sauvignon, Cabernet Franc, Merlot, and Zinfandel as its key varietals. In addition, the appellation has 13 wineries, including Beaulieu vineyard and Caymus.

 3/25/1994: On this day, Hames Valley AVA was established. Hames Valley AVA is located in the Santa Lucia Range foothills in Monterey County. The appellation encompasses 10000 acres of land with 2000 acres under vines. Hames Valley experiences dramatic shifts in temperatures during day and night, producing grapes with intense and bold flavors. The AVA’s terroir is suitable for Rhone-style varietals.

5/19/1994: On this day, the Seiad Valley wine region was established. Seiad Valley is California’s northernmost AVA, situated adjacent to the Klamath River in Siskiyou County. The AVA’s elevation ranges between 700 and 3000ft above sea level. The 2248-acre AVA is characterized by rocky terrain, and its key grape is Riesling.

 3/31/1995: On this day, Cucamonga Valley AVA was recognized.  Cucamonga Valley is an AVA in San Bernadino County whose growing region extends to Riverside County. At its creation, the AVA encompassed 109400 acres of land; the land has been diminishing due to increasing demand for land development. Currently, there are less than 1000 acres under vines. The AVA’s key grapes include Syrah, Mourvèdre, and Zinfandel.

9/11/1995: On this day, the St. Helena wine region was established. Founded on 11 September 1995, this subregion, St. Helena, is a viticultural area sandwiched between Mayacamas and Vaca mountains, elevated 100-700 feet above sea level. Its soils are mostly loam with varying gravel. The AVA hosts the oldest winery in Napa Valley, Charles Krug. The AVA is significant in the Napa Valley region, having more than 30 wineries. Many varietals do well in this viticultural area, but the most common include Cabernet Sauvignon, Merlot, Zinfandel, Cabernet Franc, Sauvignon Franc, Syrah, and Merlot. Approximately 6800 of the AVA is planted in vineyards.

 6/13/1996: On this day, Malibu-Newton Canyon was region was established. Malibu-Newton Canyon appellation is located at the limits of the famous malibu town, northwest of Los Angeles County. The AVA’s first vineyards after Prohibition were planted by George Rosenthal. Today, the AVA is identified by the Character-setting Rosenthal Estate winery. Besides, the AVA’s terroir identifies with Newton Canyon, which binds its microclimates. The AVA plants several Bordeaux-style blends, and its key varietals are Merlot, Cabernet Sauvignon, Cabernet Franc, and Chardonnay.

12/23/1996: On this day, Redwood Valley AVA was established. Redwood Valley is an upland AVA boasting cooler climates than surrounding appellations due to coastal currents penetrating through a gap in the coastal ridge. The appellation is located in Mendocino County, and its key varietals are Petite Sirah, Zinfandel, Cabernet Sauvignon, and Barbera.

 10/27/1997: On this day, Mendocino Ridge AVA was established. Mendocino Ridge AVA consists of any wine-growing site elevated above 1200 ft in Mendocino County and Anderson Valley AVAs. The AVA cover over a quarter-million acres of mountain peaks around Redwood and Douglas with only 75 acres of planted vines. The entire AVA is planted with Zinfandel varietal.

 4/7/1998: On this day, the Yorkville Highlands wine region was established. Yorkville Highlands appellation is located in Mendocino County, characterized by diurnal temperatures and high elevation. The AVA encompasses 40000 acres of land with 414 acres under vines. Red wines dominate this appellation, forming 83 percent of planted vineyards. The AVA’s key grapes include Cabernet Sauvignon, Syrah, Pinot Noir, and Merlot.

 6/22/1998: On this day, Diablo Grande AVA was established. Diablo Grande AVA is located in Stanislaus County and fully owned by Diablo Grande Resort. The appellation encompasses 30000 acres of land, of which 36 are under vines. The appellation derives its name from Mt. Diablo, the largest mountain in the Pacific Coast Range. Its key grapes are Cabernet Sauvignon, Merlot, Chardonnay, Pinot Noir, Syrah, and Sangiovese.

 1/20/1999: On this day, San Fransisco Bay AVA was established. San Fransisco Bay AVA is located at the center of the San Fransisco Bay Area, extending through eight counties; Santa Clara, Alameda, Santa Cruz, Contra Costa, San Fransisco, San Benito, and San Mateo. The microclimates of the AVA are influenced by cooling breezes and fogs from the waters of the bay, leading to an extended ripening period. Several varietals flourish in the AVA, including Zinfandel, Cabernet Sauvignon, and Pinot Noir.

2/17/1999: On this day, Chiles Valley AVA was established. Chiles Valley AVA was established in 1999 and is located in the Vaca Mountain range, in the northeastern part of the valley. It is mostly shielded from the effects of the bay and experiences warmer temperatures compared to other AVAs. Chiles Valley AVA is elevated 600 – 1200 ft above sea level. During the winter, the AVA experiences cooler temperatures than other regions. Due to terroir, there are few wineries, and vineyards are larger. The key grapes grown include Cabernet Sauvignon and Zinfandel

 3/19/1999: On this day, Yountville wine region was recognized. This appellation consists of 4000 acres of planted vineyards. The AVA centers around Yountville town, named after Geroge Yount, who planted the first vineyards in the region in 1836. The appellation boasts 4000 acres of planted vineyards. Its soils are mostly gravelly silt loams. In addition, it is elevated 20-200 feet above sea level. Yountville AVA has a unique terroir and climate, allowing the Cabernet Sauvignon varietal to flourish.

 2/26/2001: On this day, Fair Play AVA was established.  Fair Play AVA is located in El Dorado County, encompassing 350 acres of planted vineyards. The appellation experiences fairly intense temperatures and cool breezes at night. Its key Varietal is Zinfandel, although other varietals such as Petite Sirah, Cabernet Sauvignon, and Syrah flourish here.

5/9/2001: On this day, River Junction AVA was established. River Junction AVA extends between two counties, Stanislaus and San Joaquin. At its establishment, the AVA encompassed 1300 acres of land planted several varietals, including Viognier, Zinfandel, Cabernet Sauvignon, Merlot Chardonnay, and Petite Sirah, are planted. The AVA boasts sandy loam soils excellent for viticulture.

California Wine Regions, California Wine Regions by Date

Source: https://grapeadventures.com/wine_trail/santa-rita-hills-wine-trail/

 5/31/2001: On this day, Sta. Rita Hills wine region was established.  Sta. Rita Hills AVA is located in Santa Barbara County and is part of the larger Central Coast. The AVA experiences cooling breezes from the Pacific Ocean, which create an environment suitable for Pinot Noir, Chardonnay, and other cool-weather varietals. The AVA covers 30720 acres of land, of which 2700 are under vines.

6/1/2001: On this day, Diamond Mountain District AVA was established. Diamond Mountain District AVA was established in 2001. The AVA region boats volcanic soils, hence its name, and 500 acres of planted vineyards. Grape varietals in this region include Cabernet Franc, Cabernet Sauvignon, Malbec, Merlot, Petit Verdot, and Sauvignon Blanc. Jacob Schram planted the first vineyards in the AVA in 1868. The AVA’s temperature is less fluctuating, and its key varietals are Cabernet Sauvignon and Cabernet Franc.

 2/28/2002: On this day, Rockpile AVA was legally recognized. Rockpile is located north of Dry Creek Valley, stretching west of Sonoma Lake to Mendocino County. The AVA is famous for wine with great concentration and balance. Rockpile is located far north of the Sonoma region, so it is not affected by the fogs and breezes from the Pacific Ocean. As a result, it experiences warmer temperatures than most of the region’s appellations. Besides, it is highly elevated (up to 1900 feet) and boasts steep slopes, rocky soils, and long days of exposure to sunlight. The warm temperatures hasten the ripening and add to the richness.

 30 October 2003: On this day, Bennett Valley was legally recognized. Bennett Valle AVA is one of the smaller AVAs in Sonoma. It is nudged between three mountain peaks adding to the AVA’s unique terroir. As a result, varietals that require a cool and unique climate are produced here. The AVA’s main varietals include Merlot, Chardonnay, and Syrah. The AVA is also famed for its small grower-operated wineries. Its location allows it to experience a unique terroir, including rocky mountain soils, volcanic soils, and moderately cool ocean breezes and fog. These conditions boost the long growing season and allow grapes to preserve their acidity. The AVA comprises more than 650 acres of planted vineyards and 17 wineries.

 2/25/2004: On this day, Oak Knoll District of Napa Valley was established. This appellation is located at the intersection of the northern warmer and southern cooler appellations, elevated 500 feet above sea level. As a result, it takes a sweet spot among Napa Valley AVAs. Merlot and Chardonnay are key grapes in this appellation. Sparkling varietals that do not do well in other AVAs do well in this appellation. The appellation has 4150 acres of planted vineyards. Its wine has a distinguished and delicate taste due to its unique climate and terroir.

6/29/2004: On this day, Salado Creek AVA was established. Salado Creek is an AVA that consists of small vignerons, and their wine is made at contact wineries. It is located to the north of Stanislaus County. The 2490-acre AVA boasts clay and Sandy loam soils with an alluvial fan. These soils are well-drained, forcing vines to go deeper into the soils leading to concentrate flavors in wines. The Diablo Mountains protect the appellation from marine influences. Besides, its warmer climate is suitable for Cabernet Sauvignon, Syrah, Sauvignon Blanc, and Viognier, its key grapes.

 6/29/2004: On this day, San Bernabe AVA was recognized. San Bernabe AVA is one of the largest single-vineyard appellations in the United States. The 5000-acre vineyard is one of the largest in the world; it experiences cooling breezes and fog from the Pacific Ocean and boasts diverse soils. In addition, the appellation experiences diurnal temperatures leading to an extended growing season. The appellation’s key grapes are Zinfandel and Riesling. Other grapes include Chardonnay, Pinot Noir, Cabernet Sauvignon, Lagrein, Barbera, and Malvasia.

 7/12/2004: On this day, Red Hills Lake County wine region was established. Red Hills Lake County is an appellation located along Clear Lake’s southern shores in Lake County. The AVA is found in the northern part of the Mayacamas mountains, elevated between 1350 and 3700 ft above sea level. Most of its vines are planted between 2000 and 2600 ft above sea level. The AVA boasts well-drained volcanic soils resulting from the mountainous terrain; it experiences temperature shifts during the day and night that allow extended ripening and grapes to maintain acidity. The AVA’s major varietals include Cabernet Franc, Cabernet Sauvignon, Sauvignon Blanc, Petite Sirah, Zinfandel, and Syrah.

California Wine Regions, California Wine Regions by Date

Source: https://iruaiwine.com/new-products/trinity-lakes-blaufrankisch

 2/8/2005: On this day, Trinity Lakes AVA was established. Trinity Lakes is an AVA in trinity County, surrounding Lewiston and Trinity lakes and encompassing a portion of Trinity River. The AVA is more inland and remote than most nearby AVA, making it more intriguing and unique. The AVA boasts a rugged terrain with centuries’ set soils rich for cultivating Vitis vinifera. The key grapes in the 96000-acre AVA are Riesling, Chardonnay, and Pinot Noir.

 7/1/2005: On this day, the High Valley wine region was established. High Valley is a sub-appellation of the greater Lake County AVA, located in the eastern region of Lake County. The AVA is elevated from 1700 to 2400ft above sea level, contributing to diurnal temperatures. Wines from this appellation exhibit complex aromatics and retain their acidity due to lengthened ripening period. The AVA boasts free-draining volcanic soils leading to the production of wines with concentrated flavors. Syrah, Petite Sirah, and Grenache are key varietals here.

 10/14/2005: On this day, Dos Rios wine region was established. Dos Rios is located in the northern part of Mendocino County, developed by Ralph Cater. The AVA’s soils are infertile compared to other AVAs in the county. Only a single winery, Vin de Tevis, operates in the AVA and has six acres of planted vineyards. The AVA’s main grapes are Merlot, Cabernet Sauvignon, and Zinfandel.

 12/7/2005: On this day, Ramona Valley AVA was established. Ramona Valley AVA is located in San Diego County. The AVA encompasses 89000 acres of land with over 100 acres under vines. It is the county’s second AVA to be officially approved. Its unique terroir is suitable for Petite Sirah, cabernet Sauvignon, Zinfandel, Tempranillo, Barbera, and Syrah.

 2/16/2006: On this day, Covelo AVA was established. Covelo is an intriguing AVA with only two acres of land under vines. The AVA is located in the northern part of Mendocino County. The AVA boasts free-draining, fertile, deep loam soils that are challenging to viticulture. These soils lead to the prolific growth of vines and thus require rigorous vine management to produce quality grapes. Leaf plucking and crop thinning are the main methods used to manage vines. Common grapes produced in this AVA include Tempranillo, Grenache, Pinot Noir, and Mencia.

 6/8/2006: On this day, San Antonio Valley AVA was established. San Antonio Valley is an AVA centered at the center of San Antonio Valley in the southern part of Monterey County. The AVA boasts a warm climate but experiences morning fog from Lake San Antonio and evening cooling breezes from the Pacific Ocean. The AVA’s elevation ranges from 580 to 2800, encompassing over 800 acres of land under vines.

 7/17/2006: On this day, Alta Mesa wine region was established. Alta Mesa is a sub-appellation of Lodi AVA, located in Sacramento County. The AVA is named after a Spanish phrase, meaning “High Table,” since it’s fairly elevated than most appellations in Lodi. The 55400-acre AVA has a distinct climate and boasts alluvial soils excellent for viticulture. Its key grapes are Barbera, Merlot, Malbec, Cabernet Sauvignon, Cabernet Franc, and Syrah.

 7/17/2006: On this day, Borden Ranch was established. Borden Ranch is also a sub-appellation of Lodi AVA extending between Sacramento and San Joaquin counties. Cabernet Sauvignon, Syrah, Zinfandel, Albarino, and Viognier are the key grapes planted in this AVA. The AVA experiences a Mediterranean climate, with warm days cooled with breezes from rivers running through it.

 7/17/2006: On this day, Clement Hills AVA was established. Clement Hills AVA is located in San Joaquin County, encompassing 85400 acres of land, of which 21700 are under vines. The AVA has a unique climate, experiencing warmer and wetter conditions than appellations immediately to its west. Its diurnal shifts are larger, leading to long ripening periods. The appellation boasts sandy loam and clay soils suitable for several red and white varietals.

 7/17/2006: On this day, Cosumnes River AVA was established. Cosumnes Rives AVA extends between two counties, San Joaquin and Sacramento, with most of it located in Sacramento County. It is part of the larger Lodi AVA elevated between 5 and 48 ft above sea level. The low elevation ensures the AVA experiences maximum marine influences, making it cooler than surrounding AVAs. As a result, Chardonnay and Sauvignon Blanc are the dominant grapes in this AVA.

7/17/2006: On this day, Jahant AVA was established. Jahant AVA is a sub-appellation of Lodi AVA with most of its planting region in San Joaquin County; it is the smallest among Lodi sub-AVAs. A small portion of the AVA extends into Sacramento County. The AVA is characterized by a cooler climate and pink-colored soil from other Lodi sub-appellations. Most of its grapes are processed in Napa and Sonoma. The appellation covers 28000 acres of land, of which 9000 are under vines.

 7/17/2006: On this day, the Mokelumne River wine region was establishedMokelumne River is part of Lodi AVA, named after Mokelumne River. The AVA is characterized by fairly uniform elevation and boasts granite sandy loams. The AVA borders Jahant AVA to the north (separated by Jahant Road) and the Mokelumne River to the west. The AVA covers 85700 acres of land, of which 42000 acres are under vines. The key grape is Zinfandel, although other varietals are also planted.

 7/17/2006: On this day, Saddle Rock-Malibu AVA was established. Saddle Rock-Malibu AVA is located in the Santa Monica Mountains, in the western part of Los Angeles Couty; it neighbors Malibu-Newton Canyon and is part of South Coast AVA. Its high elevation ensures the production of rich, earth-red wines from its key grapes, Merlot, Cabernet Sauvignon, and Syrah.

 7/17/2006: On this day, Sloughhouse AVA was established. Located in Sacramento County, this AVA is part of Greater Lodi AVA and the warmest among Lodi appellations. Its terroir is considered a transition between the nearby Sierra Foothills and Central Valley. The AVA is made of 78000 acres of land, of which 8000 are under vines. Red wines are dominant even though white varietals such as Sauvignon Blanc and Chardonnay are also planted extensively.

 7/17/2006: On this day, Tracy Hills AVA was established. Tracy Hills AVA is located in both Stanislaus and San Joaquin counties. The AVA was recognized officially after a petition by Tulip Hill winery to recognize it. The AVA encompasses 39200 acres of land elevated between 100 and 500 ft above sea level.

 10/29/2008: On this day, Leona Valley was established. Leona Valley is located in the northeast part of Los Angeles County. The AVA is far inland and experiences little marine influence. It’s in the shadow of Santa Susana and San Gabriel Mountains. The microclimate of this appellation produces elegant Sangiovese, Syrah, Zinfandel, and Cabernet Sauvignon. Besides, Chardonnay is also planted here.

 10/8/2009: On this day, Happy Canyon of Santa Barbara AVA was established. Happy Canyon of Santa Barbara is one of the smallest AVAs in Santa Barbara County. It has a unique terroir, experiencing high temperatures during the day (topping 100 degrees during summers), which drop significantly at night. The wide shift in diurnal temperatures is excellent for Bordeaux varietals. As a result, commonly grown varietals in this Canyon include Merlot, Cabernet Sauvignon, Malbec, Cabernet Franc, Sauvignon Blanc, and Petit Verdot.

California Wine Regions, California Wine Regions by Date

Source: https://www.pineridgevineyards.com/recipes/

 12/8/2009: On this day, Calistoga AVA was established. This AVA is located in the far north part of Napa Valley. Its distance from the cooling effects of San Pablo Bay ensures it receives the warmest temperatures among other regions. The appellation is elevated 300 – 1200 feet above sea level. Calistoga AVA experiences significant diurnal temperatures that are a favorite for Cabernet Sauvignon varietal. As a result, its key varietals are Cabernet Sauvignon, Zinfandel, Syrah, and Petite Sirah.

7/22/2010: On this day, Sierra Pelona AVA was established. Sierra Pelona is an AVA located in the northwest region of Los Angeles County; it is part of the High Desert area bordering the Mojave Desert. The AVA’s terroir allows the planting of several varietals. However, its key grape is Zinfandel.

5/24/2011: On this day, the Antelope Valley of California High Desert wine region was established. Antelope Valley of California High Desert is an AVA located in the northern region of Los Angeles County. The AVA’s key grapes include Zinfandel, Syrah, Sangiovese and Tempranillo.

 10/27/2011: On this day, Pine Mountain-Cloverdale Peak AVA was established. Pine Mountain Cloverdale peaks AVA was legally established. It is among the recent in the Sonoma wine region. The AVA is known for its high elevation, from 1600 to 3000 feet above sea level. Besides elevation, the AVA also boasts mountainous soils and steep topography. Its elevation puts it above the fog line and experiences long sunny periods. Cabernet Sauvignon flourishes in these conditions and is the dominant varietal in the AVA. In addition, there are also other varietals, including Merlot, Sauvignon Blanc, Malbec, and Zinfandel, albeit in small quantities.

 12/14/2011: On this day, Coombsville AVA was established. Coombsville AVA was established on 14 December 2011 and boasts moderate to cooler temperatures due to its proximity to the flat area nearing San Pablo Bay. The AVA is elevated 700 ft above sea level. Its key varietals are Pinot Noir, Merlot, and Chardonnay.

 12/14/2011: On this day, Fort Ross-Seaview AVA was established. The AVA was legally recognized after carving out 27500 acres from the greater Sonoma Coast AVA. Fort Ross-Seaview is another AVA with diverse characteristics compared to the rest of the Sonoma subregions. It is located on the outskirts of the Pacific Ocean with a high altitude that ensures a unique terroir. The elevated terrain (900-1200ft) comes with management difficulties. Nevertheless, the challenges are paid off with the crisp air, enough stress, and sunshine it experiences to produce spectacular Pinot Noirs and Chardonnays. The AVA’s Pinot Noirs and Chardonnays are among the most sought-after in the country

 9/13/2012: On this day, Inwood Valley AVA was established. The Inwood Valley AVA is located in Shasta County. The 28441-acre AVA consists of 62.5 acres of planted vineyards; its terroir leads to the production of premium Cabernet Sauvignon and Burgundy-style varietals. Other grapes that do well in this AVA are Zinfandel and Syrah.

 10/2/2013: On this day, Ballard Canyon AVA was established. Ballard Canyon is an AVA forming part of the larger Santa Ynez Valley in Santa Barbara County; the AVA experiences a unique pattern of winds resulting from its north-south canyon orientation. Ballard Canyon AVA comprises 7800 acres, approximately 10 percent of the larger Santa Ynez Valley, with 550 acres of planted vines.

 10/2/2013: On this day, Big Valley District-Lake County AVA was established. Big Valley District-Lake County AVA is located in Lake County, at the edge of Clear Lake and bordering Mayacamas mountain. It is one of the less hilly AVAs in the region, covering 11000 acres. Its terroir creates shorter growing periods and is suited for the Sauvignon Blanc varietal. Other varietals popular in the AVA include Riesling, Zinfandel, Chardonnay, Merlot, and Cabernet Franc.

2 October 2013: On this day, Moon Mountain AVA was officially recognized. Its elevation is a huge factor in the AVA’s terroir; vines are planted at 400 to 2200 feet. Growers and vintners from Moon Mountain AVA take pride in the elevation; they sometimes label it in their wines. The mountainous climate and regular breezes from the ocean allow varietals such as Cabernet Sauvignon, Merlot, Syrah, and Zinfandel.

 10/2/2013: On this day, Kelsey Bench-Lake County AVA was established. Kelsey bench-Lake County AVA is a sub-appellation of the Lake County AVA, established in 2013. The AVA consists of well-drained clay and loam soils resulting from gravel deposits from Big Valley. Major varietals in this AVA include Sauvignon Blanc, Merlot, Cabernet Franc, Zinfandel, Riesling, and Viognier.

7/18/2014: On this day, Malibu Coast AVA was formed. Malibu Coast was granted AVA status in 2014, although grapes have been planted in the region as early as 1824. The AVA spans 46 miles long and 9 miles wide. Its main varietals are Chardonnay, Cabernet Sauvignon, and Syrah. Malibu Coast AVA boasts volcanic soils that warm easily, providing thermal effects during the evenings and preventing mildew.

 8/1/2014: On this day, Manton Valley AVA was recognized. Vineyards were planted in Tehama County as early as 1800, but it was not until 2014 that the county received its first formally approved AVA, Manton Valley. However, the AVA spreads to Shasta County as well. The 11178 acre-AVA consists of 200 acres of planted vineyards. Several varietals are planted in this AVA, including Merlot, Chardonnay, Cabernet Sauvignon, Petite Sirah, and Sauvignon Blanc.

10/9/2014: On this day, Adelaida District AVA was established. Adelaida District AVA is located in San Luis Obispo County within a larger Paso Robles AVA. The AVA is located in the northwestern part of Paso Robles AVA at an altitude of between 900 and 2200 ft above sea level. The AVA experiences high rainfall and marine experiences due to its terroir and proximity to the Pacific Ocean; most of its soils are calcareous, including limestone and patchy hillside soils. Varietals produced here include Zinfandel, Syrah, Mourvèdre, Merlot, Cabernet Sauvignon, and Grenache.

California Wine Regions, California Wine Regions by Date

Source: https://napavalleywineacademy.com/exploring-the-adelaida-district-of-paso-robles/

 10/9/2014: On this day, Creston District AVA was established. Creston District AVA is also part of the Paso Robles AVA in San Luis Obispo County. Its mountainous topography with its altitude ranges from 1000 to 2000 ft above sea level. The 47000-acre AVA has more than 1400 acres of planted vineyards. Its terroir allows a majority of varietals to be planted. However, Bordeaux varietals are common, especially Cabernet Sauvignon.

 10/9/2014: On this day, the Eagle Peak Mendocino County wine region was established. The Eagle Peak Mendocino County AVA is located in Mendocino County. It derives its name from the nearby Eagle Peak Summit and is known for making lush red wines distinct from the south. The 26260-acre AVA comprises 120 acres of planted vineyards divided among five producers. Pinot Noir is the main varietal, and the AVA is distinguished for producing high-quality Pinot Noir.

10/9/2014: On this day, the El Pomar District wine region was established. El Pomar District is a sub-appellation of the Paso Robles. The AVA is elevated at altitudes ranging from 740 to 1600 ft above sea level. The 21300-acre AVA has over 2000 planted vineyards, majorly Bordeaux varieties, including Cabernet Sauvignon, Cabernet Franc, and Merlot.

10/9/2014: On this day, the Paso Roble Estrella District wine region was established. Paso Robles Estrella is the largest district of the Paso Robles AVA. It was established with other sub-appellations of the Paso Robles AVA in 2014. The AVA’s main varietals are Zinfandel and Cabernet Sauvignon. Besides, it is popular for its Rhone-style wines.

 10/9/2014: On this day, the Paso Robles Geneseo District wine region was established. Paso Robles Geneseo District is part of the larger Paso Robles established in 2014. The AVA is named after German settlers that moved there from Geneseo, Illinois, in the 1880s. The AVA has enjoyed a rich history in winemaking; it is elevated between 740 and 1300 ft above sea level and experiences moderate marine influences. The AVA’s major varietals include Syrah, Zinfandel, Merlot, and Cabernet Sauvignon.

 10/9/2014: On this day, Paso Robles Highlands District AVA was established. Paso Robles Highlands District AVA is a sub-appellation of the Paso Robles AVA in San Luis Obispo County. The appellation borders Creston district to the west and San Juan Creek to the north. Red wines and Chardonnay dominate the AVA.

10/9/2014: On this day, Paso Robles Willow Creek District wine region was established. Paso Robles Willow Creek District is part of the greater Paso Robles AVA. The appellation is characterized by mountainous terrain. Syrah and Rhone varietals, along with Cabernet Sauvignon and Viognier, are the stars in this AVA.

10/9/2014: On this day, San Juan Creek AVA was established. San Juan Creek AVA is also part of the greater Paso Robles AVA established in 2014. The AVA is characterized by low rain and high temperature, making it suitable for Bordeaux varietals. Its soils are loamy and gravelly, with alluvial fans encouraging vigor in vines.

 10/9/2014: On this day, San Miguel District AVA was established. San Miguel District AVA is part of the larger Paso Robles AVA located in its northernmost part; it is elevated between 580 and 1600 ft above sea level. The appellation experiences minimal marine effects from the Pacific Ocean and achieves cooling through the Templeton Gap. The AVA is dominated by red wines, with Merlot and Cabernet Sauvignon forming the majority.

10/9/2014: On this day, the Santa Margarita Ranch wine region was recognized. Santa Margarita Ranch is a sub-appellation of Paso Robles AVA established in 2014. The appellation is elevated from 900 to 1400 ft above sea level. It is also characterized by sandy loam soils with an alluvial fan. Its primary varietal is Syrah, but other varietals, including Merlot, Chardonnay, Zinfandel, and Cabernet Sauvignon, feature heavily.

 10/9/2014: On this day, the Templeton Gap District region was recognized. Templeton Gap is a sub-AVA of the Paso Robles AVA located on the western edge of the appellation. The AVA’s soft high elevation and westerly location ensure its receives the strongest marine influence among Paso Roble sub-AVAs. Its terroir is suitable for many varietals, but the southern Rhone and Syrah are the dominant varietals.

2/18/2015: On this day, Fountaingrove District AVA was legally recognized. Fountaingrove District appellation is located in the eastern region of the Sonoma wine region. Most of its vineyards are family-owned. The AVA also boasts diverse soils and climates; this includes a combination of well-drained volcanic soils and marine influences, giving wines from this subregion a unique flavor. It comprises 600 acres of planted hillside vineyards. The vineyard’s elevation (up to 2000 feet), soils, and unique climate allow Cabernet Sauvignon, Merlot, and Syrah varietals to flourish.

 8/7/2015: On this day, Squaw Valley-Miramonte AVA was recognized. Squaw Valley-Miramonte AVA is located in the eastern part of Fresno County. Its terroir is unique from other AVA in the county, experiencing long Sundays. However, its temperatures are regulated by winds from surrounding mountains. The AVA receives high rainfall that is drained by the slopy topography. Its key varietals include Cabernet Sauvignon, Cabernet Franc, and Barbera.

1/21/2016: On this day, Los Olivos District was established. Los Olivos District AVA is a Santa Ynez Valley AVA sub-appellation comprising 1121 acres of planted vineyards. Its key grapes are Cabernet Sauvignon, Rhone varietals, Sauvignon Blanc, and Cabernet Blanc.

 2/24/2016: On this day, Lamorinda AVA was established. Lamorinda AVA is located in Contra Costa County’s San Fransisco Bay Area. The appellation consists of 30000 acres with 139 acres of planted vineyards. The AVA’s soils are thin with high levels of sand and clay compared to surrounding regions. In addition, it’s warmer than southern and northern areas. The AVA experiences cooling experiences from the Pacific Ocean, and its key grapes are Cabernet Sauvignon, Cabernet Franc, Chardonnay, Syrah, and Pinot Noir.

 12/7/2017: On this day, Petaluma Gap AVA was legally recognized. Petaluma Gap AVA is one of the most recent AVA legally established in the Sonoma wine region; the AVA boasts more than 4000 acres of planted vineyards. Petaluma Gap AVA is located 25 miles north of San Fransisco, surrounding Petaluma town. The region is distinctive and experiences diurnal temperatures and heavy marine influences from San Pablo Bay. Due to its climate, most vineyards are dedicated to Pinot Noir varietal; the rest is planted with Chardonnays and Syrah.

 8/25/2020: On this day, Alisos Canyon AVA was recognized. Alisos Canyon is an AVA located in Santa Barbara County, California. The 5774-acre AVA is nestled between Santa Maria Valley and Santa Ynez Valley. Its popularly known for producing high-quality wine from the Rhone-style varietals resulting from distinct climatic conditions. The AVA is located in Santa Barbara’s Goldilocks Rhone zones, best for Rhone grapes.

11/19/2020: On this day, Tehachapi Mountains AVA was recognized. Tehachapi Mountains AVA, established in 2020, is one of California’s highly elevated appellations. The high elevation and warm conditions allow the appellation to exhibit excellent conditions for viticulture. Tehachapi Mountains AVA comprises approximately 58000 acres, and its varietals include Syrah, Viognier, Zinfandel, and Tempranillo.

California Wine Regions, California Wine Regions by Date

 6/17/2021: On this day, Palos Verdes Peninsula AVA was recognized. Palos Verdes Peninsula AVA is located in the southwestern part of Los Angeles County. It is one of the newest AVA in the county. The 30000-acre appellation experiences strong marine influences due to its proximity to the ocean. Its key grapes are Chardonnay and Pinot Noir.

3/9/2022: On this day, San Luis Obispo Coast (SLO Coast) wine region was established. San Luis Obispo Coast AVA is one of the newest appellations approved by the US Alcohol and Tobacco Tax and Trade Bureau. The AVA, popularly known as SLO (slow) coast, stretches 97 kilometers along Pacific Ocean Coast. Therefore, it experiences strong oceanic influences that characterize wines from the AVA. Its terroir is excellent for Burgundy varietals, including Riesling, Albarino, and Gruner Veltliner.

5/23/2022: On this day, West Sonoma Coast  AVA was established. West Sonoma Coast is an AVA located in the westernmost part of Sonoma County. It is also one of the newest appellations in the county, with approximately fifty vineyards. The appellation’s key grapes are Syrah, Chardonnay, and Pinot Noir.

 6/3/2022: On this day, Paulsell Valley AVA was legally recognized. Paulsell Valley AVA is located in Stanislaus County, in San Joaquin Valley, west Sierra Foothills AVA. The AVA experiences higher temperatures and is slightly drier than the surrounding AVA, making it suitable for hardy grapes. As a result, its key grapes are Petite Verdot, Cabernet Sauvignon and Sirah.

 6/3/2022: On this day, Upper Lake Valley AVA was recognized. Upper Lake Valley is an AVA located in Lake County. It is a sub-AVA of Clear Lake AVA, part of the North Coast AVA. It is one of the newest AVA in California, modifying the boundaries of Clear Lake AVA such that it fits in entirely. The 17360-acre AVA consists of 528 acres of planted vineyards, and its key grapes include Chardonnay, Sauvignon, Blanc, Zinfandel, Muscat, and Cabernet Sauvignon.

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