Sonoma Valley is located in southeastern Sonoma County, California, in the San Francisco Bay Area. Known as the birthplace of the California wine industry, the valley is home to some of the earliest vineyards and wineries in the state, some of which survived the phylloxera epidemic of the 1870s and the impact of prohibition in the early 20th century. Today, the valley's wines are protected by the US Federal Government's Sonoma Valley and Carneros AVAs (or American Viticultural Areas).
Sonoma Valley offers a wide range of year-round festivals and events, including the Sonoma International Film Festival. Points of interest include the Quarryhill Botanic Garden, Mission San Francisco Solano, Jack London State Historic Park, Sonoma State Historic Park and the Blue Wing Inn of 1840.
The valley is located in southeastern Sonoma County between the Mayacamas Mountains and Sonoma Mountains. It stretches from San Pablo Bay in the south to the city of Santa Rosa in the north. Sonoma Creek flows down the valley to the bay. The area includes the incorporated city of Sonoma and part of the City of Santa Rosa, as well as numerous unincorporated communities, including Kenwood and Glen Ellen near Santa Rosa and, near Sonoma, El Verano, Boyes Hot Springs, Fetters Hot Springs, and Agua Caliente.
The Sonoma Valley AVA is an American Viticultural Area in Sonoma County, California, USA which centers on the Sonoma Valley (also known as The Valley of the Moon) in the southern portion of the county. The appellation is bordered by two mountain ranges: the Mayacamas Mountains to the east and the Sonoma Mountains to the west.
Sonoma Valley has played a significant role in the history of California wine. The first vineyards in the valley were planted by Franciscan monks at Mission San Francisco Solano in 1823. In 1857, Agoston Haraszthy established one of California's first successful commercial wineries here when he founded Buena Vista Winery. By 1920, there were 256 wineries in Sonoma Valley with more than 20,000 acres (8,100 ha) planted to grape vines. Prohibition affected Sonoma Valley as hard as any other wine region in California, and most wineries were unable to continue operating. Recovery after the repeal of Prohibition in 1933 was slow. Even in 1969, there were only 58 bonded wineries in Sonoma Valley. The wine industry in the valley began to expand rapidly in the 1970s and 1980s. Official boundaries for the Sonoma Valley wine region were codified into federal law in 1981 as the eighth designated American Viticultural Area. By 2005, there were 254 wineries, and over 65,000 acres (26,000 ha) under vine. The wine industry annually contributes over $8 billion USD to the local economy.