Napa Valley AVA

The Napa Valley Vintners date the Napa Valley wine industry as it is known today to 1836, when George Calvert Yount, holder of a Mexican land grant, first planted commercial grapevines in the valley; the city of Yountville was later named in his honor. John Patchett is credited with opening the first commercial winery in the Napa Valley in 1859, hiring Charles Krug as his winemaker. According to the same history, vineyard area grew from 225 acres in 1856 to 24,664 acres in 1875, and by 1890 there were nearly 200 wineries in Napa and the surrounding valley. Phylloxera, which the Vintners say decimated over 80% of the vines planted, was followed by Prohibition, in effect from 1920, and the Great Depression. The defining modern moment came on May 24, 1976, when eleven judges, nine of them French, blind tasted 20 wines at the Judgment of Paris and gave top honors to the 1973 Chateau Montelena Chardonnay and the 1973 Stag's Leap Cabernet Sauvignon, both from the Napa Valley.

• Georges de Latour hired André Tchelistcheff as winemaker at Beaulieu Vineyards in 1938; the Napa Valley Vintners credit Tchelistcheff with introducing small French oak barrels for aging, malolactic fermentation and cold fermentation to the valley
• The Napa Valley Vintners association was founded in 1944, when seven vintners signed an agreement of association, among them Robert Mondavi of CK Mondavi and Sons, John Daniel Jr. of Inglenook and Louis M. Martini
• Robert Mondavi Winery's original Oakville estate was founded in 1966, Decanter reported in 2026
• Decanter notes that the winning Chateau Montelena 1973 Chardonnay, which came top out of the 10 French and Californian Chardonnays poured blind at Steven Spurrier's 1976 tasting, was a blend: Montelena stated in 2014 that 39% of the grapes came from Belle Terre Vineyard in Alexander Valley, 35% from Bacigalupi Vineyard in Russian River Valley, 23% from Hanna Vineyard in Oak Knoll and 3% from Calistoga

According to the Napa Valley Vintners, Napa Valley is only 30 miles in length and five miles across at its widest point. The Vaca Range forms the valley's eastern boundary and shields it from the heat of the Central Valley, while the Mayacamas Mountains separate it on the west from the cooler marine influences of neighboring Sonoma County, and the Napa River bisects the valley. The Vintners describe a dry Mediterranean climate, a type found on only 2% of the Earth's surface, with a long growing season of sunny, warm and dry days followed by cool evenings that allows grapes to ripen slowly and evenly. The most moderate temperatures are found in Carneros, cooled by marine breezes that sweep through the Golden Gate and across San Pablo Bay; farther up the valley the Pacific Ocean exerts less influence, with warmer summers, cooler winters and greater rainfall. Fog shapes the valley floor: the Vintners describe Oakville as strongly affected by night and early morning fog, and in the Oak Knoll District marine air and fog can remain until late morning. Per the Vintners' 2025 Fast Facts, vineyards range in elevation from sea level to 2,600 feet (800 meters), and half of the world's 12 recognized soil orders and 33 different soil series are found in the valley.

• Los Carneros, whose boundaries TTB's regulation places in both Napa and Sonoma Counties, is cool, with prevailing marine winds from San Pablo Bay and through the Petaluma Gap; the Napa Valley Vintners say its summer highs rarely exceed 80°F (27°C) and its rainfall, up to 24 inches, is the lowest in Napa Valley
• Oakville and Rutherford are moderately warm, with high-summer temperatures in the mid-90°F range; the Vintners describe Rutherford's western benchland as sedimentary, gravelly-sandy and alluvial, and call the Rutherford Bench the most famous of the valley's alluvial fans
• Howell Mountain (1,400 to 2,600 feet) sits above the fog line with little-to-no marine influence, Mount Veeder (500 to 2,600 feet) has sedimentary, former-seabed soils, and Diamond Mountain District (400 to 2,200 feet) has residual uplifted soils of volcanic origin, according to the Napa Valley Vintners
• In Calistoga, at the valley's narrow tip, daytime summer temperatures may peak above 100°F (38°C) and fall to the low 40s°F (6°C) at night, due to cool afternoon and evening breezes drawn in from the Pacific through the Chalk Hill Gap, per the Napa Valley Vintners

Cabernet Sauvignon dominates Napa Valley with approximately 54% of all plantings and around 25,000 acres, according to the Napa Valley Vintners' 2025 Fast Facts, which list Chardonnay at 12% (5,628 acres), Merlot at 8% (3,632 acres), Sauvignon Blanc at 6%, Pinot Noir at 5%, and Zinfandel and Cabernet Franc at 3% each. The same figures put 80% of vineyard acreage in red wine grapes and 20% in white, from more than 34 varieties grown in the valley. The Vintners' grape-variety page says Cabernet Sauvignon accounts for 40% of Napa Valley's total production and 55% of its crop value. Chardonnay, the second most planted variety, grows with particular success in the calcium-rich soils and cool climate of Los Carneros, and Napa Valley Chardonnay can range in style from fresh, crisp and lively to rich, round and buttery.

• Cabernet Sauvignon is grown throughout Napa Valley; the Vintners describe its wines as dense and powerful in youth but able to age gracefully, often with notes of spice from oak aging
• Barrel fermentation, lees stirring and malolactic fermentation are the main winery techniques the Vintners cite for building complex aromas and flavors in Chardonnay
• Merlot has been a fixture in Napa Valley since the early 1970s, used as in Bordeaux as a blending partner to add body and soft fruit to Cabernet Sauvignon, and has since come into its own as a varietal wine
• Petit Verdot and Malbec are almost exclusively used in classic Bordeaux blends in Napa Valley, contributing tannin, deep color and spicy complexity, and the Vintners say Napa Valley Cabernet Franc can be every bit as big and bold as Cabernet Sauvignon

The Napa Valley Vintners' 2025 Fast Facts count more than 500 wineries in Napa County, together producing more than 1,000 wine brands, and approximately 700 grape growers; 95% of Napa Valley wineries are family-owned and 80% produce fewer than 10,000 cases annually. The Vintners describe Napa Valley as one of the smallest winegrowing regions in the world, with only one-sixth the planted acreage of Bordeaux. The same Fast Facts put the wine industry's annual economic impact at more than $11 billion locally and nearly $34 billion nationwide.

• Long-established names in the Vintners' region history include Schramsberg, founded by Jacob Schram in 1862; Beringer, founded by brothers Jacob and Frederick Beringer in 1875; and Inglenook, founded by Gustave Niebaum in 1879
• Louis M. Martini and Inglenook were some of the first wineries to bottle the single-variety Cabernet Sauvignon for which Napa Valley became known, according to the Napa Valley Vintners
• In 1868 Hamilton Walker Crabb bought the parcel that would become the To Kalon Vineyard; Decanter reported in 2026 that To Kalon grapes are now split across four Constellation Brands labels, including Robert Mondavi Winery
• Nearly all Napa Valley wineries (95%) are family owned businesses, and the Vintners attribute the region's quality to viticultural practices that result in low yields of high-quality grapes

Under 27 CFR 4.25, a wine may be labeled with a viticultural area appellation such as Napa Valley only if not less than 85 percent of it is derived from grapes grown within the boundaries of the area and, for American wine, it has been fully finished within the state where the area lies. TTB's regulation for Napa Valley, 27 CFR 9.23, places the whole viticultural area within Napa County, and the Napa Valley Vintners list 17 nested AVAs inside it. The newest, Crystal Springs of Napa Valley, was established by TTB's final rule T.D. TTB-197, published October 16, 2024 and effective November 15, 2024, which describes an approximately 4,000-acre area lying entirely within the North Coast and Napa Valley AVAs whose distinguishing feature is its topography.

• The 17 nested AVAs listed by the Napa Valley Vintners are Atlas Peak, Calistoga, Chiles Valley, Coombsville, Crystal Springs, Diamond Mountain District, Howell Mountain, Los Carneros, Mount Veeder, Oak Knoll District, Oakville, Rutherford, St. Helena, Spring Mountain District, Stags Leap District, Wild Horse Valley and Yountville
• The Crystal Springs of Napa Valley petition came from Steven Burgess, president of Burgess Cellars, Inc., on behalf of local vineyard owners and winemakers; the area held approximately 30 commercial vineyards covering about 230 acres on slopes of 15 to 40 percent along the western face of the Vaca Range, and the same rule modified the existing Calistoga AVA
• The Napa Valley Agricultural Preserve, established in April 1968, set agriculture and open space as the best use for the land in the valley and foothill areas of Napa County; the Vintners' 2025 Fast Facts say nearly 90% of Napa County is under permanent or high levels of protection from development
• The Napa Valley Vintners' timeline records the Napa Name Law approved by the California Legislature in 2000 and upheld by the U.S. Supreme Court in 2006, a European Union Geographic Indication in 2007, and a U.S. Certification Mark for Napa Valley in 2015

In 1981, Robert and Margrit Mondavi and a small group of their vintner peers created the first Napa Valley Wine Auction at Meadowood Napa Valley in St. Helena to raise funds for the area's local hospitals; the Napa Valley Vintners' 2025 Fast Facts say Auction Napa Valley has raised over $245 million for local nonprofits. The valley's town names carry its history: Yountville honors George Calvert Yount, and Samuel Brannan named the region around his Agua Caliente Ranch Calistoga after planting vines there in 1859. Each May the Vintners host Afternoon in the Vineyards in partnership with the Napa Valley Grapegrowers, inviting the community to visit a nearby vineyard.

• Robert Mondavi Winery reopened its original Oakville estate on 20 April 2026, timed to the winery's 60th anniversary, after a three-year renovation, Decanter reported
• Premiere Napa Valley, the Vintners' mid-winter barrel auction for the trade, raised $412,000 at its first edition in 1997
• Napa Green provides wineries with a sustainability certification framework, and the Vintners' 2025 Fast Facts say 40% of all California sustainable winery certifications are located in Napa Valley
• Napa County residents receive special treatment at wineries participating in the Vintners' Napa Neighbor program

Primary sources (TTB regulations via ecfr.gov, the Federal Register via govinfo.gov, and the Napa Valley Vintners at napavintners.com and napavalley.wine): https://www.ecfr.gov/api/versioner/v1/full/2026-09-01/title-27.xml?part=9&section=9.23, https://www.ecfr.gov/api/versioner/v1/full/2026-09-01/title-27.xml?part=4&section=4.25, https://www.ecfr.gov/api/versioner/v1/full/2026-09-01/title-27.xml?part=9&section=9.32, https://www.govinfo.gov/content/pkg/FR-2024-10-16/html/2024-23655.htm, https://napavintners.com/napa_valley/, https://napavintners.com/napa_valley/appellations/, https://napavintners.com/napa_valley/grape_varieties/, https://napavintners.com/about/history_timeline/, https://napavintners.com/napa-valley/science/climate/, https://napavintners.com/napa-valley/science/geography/, https://napavintners.com/napa-valley/science/soils-and-geology/, https://napavalley.wine/fast-facts, https://napavalley.wine/region, https://napavintners.com/about/history/, https://napavintners.com/napa_valley/community_stewardship/. Secondary: https://www.decanter.com/learn/wine-legend-chateau-montelena-1973-305096/, https://www.decanter.com/wine-news/1976-judgement-of-paris-wines-enter-us-hall-of-fame-14250/, https://www.decanter.com/wine/napa-valley/sixty-years-later-renovated-robert-mondavi-winery-reopens-with-new-look-and-winemaking-approach/. Last verified 2026-09-28