Clarksburg AVA

The earliest record of vineyard activity near Clarksburg dates to circa 1870, near Courtland on the east bank of the Sacramento River, where James V. Sirns was among the first to grow grapes commercially in California. In the early 1900s, Italian settlers established small vineyards throughout the area for home winemaking. The region was recognized in the late 1950s as having favorable climate and soils for wine grapes. The first commercial vineyard was established in 1963 by the Herzog Co. in the Pearson District near Courtland. The modern wine era began in earnest when the Bogle family planted the area's first wine grapes in 1968, and the first bonded wineries, Bogle Vineyards and R.J. Cook, opened in 1979. Clarksburg was officially designated an AVA on January 23, 1984, following a petition submitted by John Baranek of Clarksburg Vintners and Growers.

• Circa 1870: Earliest record of commercial grape growing near Courtland on the Sacramento River's east bank
• 1963: First commercial vineyard established by the Herzog Co. in the Pearson District near Courtland
• 1968: Bogle family plants the area's first wine grapes; Bogle Vineyards and R.J. Cook open as the first bonded wineries in 1979
• January 23, 1984: Clarksburg officially designated as the nation's 57th and California's 37th American Viticultural Area

Clarksburg AVA spans portions of Sacramento, Yolo, and Solano counties in California's Sacramento Valley, roughly 15 minutes south of downtown Sacramento. The viticultural area is defined by the Sacramento River Delta landscape, consisting primarily of flat delta islands surrounded by rivers and sloughs. Elevations range from slightly more than 10 feet above mean sea level to slightly less than 10 feet below mean sea level, and soils are dense clay, silt, and loam. The signature climatic feature is the Delta breeze: southwesterly winds from the Carquinez Straits near San Francisco arrive each afternoon, creating a median temperature difference of approximately 10°F from Sacramento. With an average of 3,525 growing degree-days, Clarksburg sits in a Winkler Region IV classification, and average growing season minimum temperatures near 51°F slow overnight vine metabolism and preserve natural malic acidity. Average annual rainfall is approximately 18 inches.

• Three-county span: Sacramento, Yolo, and Solano counties; town of Clarksburg sits in the appellation's northern section
• Delta breeze: Southwesterly winds from Carquinez Straits produce approximately 10°F temperature moderation versus Sacramento, preserving grape acidity
• Winkler Region IV: 3,525 average growing degree-days; average growing season minimum near 51°F is among the lowest in surrounding delta locations
• Terrain and soils: Extremely flat to below sea level; clay, silt, and loam alluvial soils; drainage networks required to lower high water tables for viticulture

Clarksburg's vineyards are best known for Chenin Blanc, which produces remarkably honeyed wines with vibrant acidity, a style that won medals at four major California competitions as early as 1981. Petite Sirah is also particularly prized, benefiting from warm days and cool nights that develop deep color, ripe tannins, and dark fruit concentration. In reality, Chardonnay vines outnumber Chenin Blanc vines across the AVA, supplying bulk wine programs throughout California and other states. Over 35 grape varieties are cultivated, including Viognier, Verdelho, Albarino, Pinot Gris, Sauvignon Blanc, Zinfandel, and Tempranillo. Because the Clarksburg label appears on relatively few finished wines, the region's most representative expressions are its Chenin Blancs and estate-level Petite Sirahs.

• Chenin Blanc: The signature bottled varietal; produces honeyed, floral wines with vibrant acidity; won medals at four major California competitions in 1981
• Petite Sirah: Particularly renowned; warm days build concentration and tannin while cool nights preserve freshness and structure
• Chardonnay: Outnumbers Chenin Blanc in actual plantings; primarily supplies bulk wine producers across California
• 35+ varieties cultivated: Including Viognier, Verdelho, Albarino, Pinot Gris, Sauvignon Blanc, Zinfandel, Barbera, and Tempranillo

Bogle Family Vineyards is the largest and most recognized producer in the AVA. The Bogle family has farmed in the Sacramento River Delta for six generations, planting the area's first wine grapes in 1968 and founding the winery in 1979. Today Bogle sells over 2 million cases annually and ships to more than 40 countries. The Old Sugar Mill, a historic beet sugar refinery built in 1934 for the American Crystal Sugar Company, closed in 1993 and was converted into a winery destination; the first winery opened there in 2004, and it now houses approximately 14 wineries under one historic roof. The Clarksburg Wine Company, established in 2010 at the Old Sugar Mill, focuses on Chenin Blanc, Petite Sirah, and Cabernet Franc. Vinum Cellars is another notable label sourcing Chenin Blanc from long-farmed Clarksburg vineyards, including the Wilson Vineyard, farmed since 1921.

• Bogle Family Vineyards: Six-generation farming family; winery founded 1979; over 2 million cases sold annually to 40+ countries
• Old Sugar Mill: Built 1934 as a beet sugar refinery; converted to a winery collective beginning 2004; currently home to approximately 14 wineries
• Clarksburg Wine Company: Established 2010 at the Old Sugar Mill; specializes in Chenin Blanc, Petite Sirah, and Cabernet Franc
• Vinum Cellars: Sources Chenin Blanc from the Wilson Vineyard, farmed in Clarksburg since 1921 and now in its fourth generation

Clarksburg AVA was established on January 23, 1984, under federal TTB regulations, following a petition submitted by John Baranek of Clarksburg Vintners and Growers. It was designated the nation's 57th and California's 37th AVA. Federal labeling standards require wines labeled as Clarksburg to contain at least 85 percent fruit from the designated region. Merritt Island, a 5,000-acre island AVA established on May 17, 1983 as the nation's 27th AVA, later became a sub-appellation within Clarksburg. In 2022, the TTB approved expansion of the Clarksburg AVA by approximately 27,945 acres, entirely encompassing Grand and Ryer Islands to the south, bringing the total AVA to approximately 92,585 acres across Sacramento and Solano counties.

• AVA established January 23, 1984; nation's 57th and California's 37th AVA; original boundary covers 64,640 acres across three counties
• Merritt Island AVA: 5,000-acre sub-appellation established May 17, 1983 (nation's 27th AVA); surrounded by Elk Slough, Sutter Slough, and the Sacramento River
• 2022 TTB expansion: Added approximately 27,945 acres encompassing Grand and Ryer Islands; total AVA now approximately 92,585 acres
• Labeling: Wines labeled Clarksburg must contain at least 85% fruit from the designated AVA per federal TTB regulations

Located approximately 15 minutes south of downtown Sacramento, Clarksburg offers accessible wine tourism without the crowds or price premiums of more famous California wine regions. The Old Sugar Mill, a landmark brick building from 1934, serves as the primary hub for wine tasting, housing approximately 14 wineries open daily. Bogle Family Vineyards operates its tasting room on the original ranch site, offering indoor and outdoor seating with vineyard views. The broader Clarksburg Wine Country has over 20 wineries, many family-owned and operated, spread along the River Road through the Sacramento Delta's scenic agricultural landscape. The annual Clarksburg Wine Crush Festival celebrates the harvest season each autumn.

• Proximity: Approximately 15 minutes south of downtown Sacramento via Highway 160 along the Sacramento River
• Old Sugar Mill: Historic 1934 brick landmark housing approximately 14 wineries; open daily with no appointment required for most tastings
• Bogle Family Vineyards: Tasting room open daily on the original ranch site with outdoor vineyard seating and estate wine pours
• Wine Crush Festival: Annual autumn harvest celebration highlighting the region's wines and agricultural heritage