Sonoma Valley is the birthplace of the California wine industry and often called The Valley of the Moon. Sonoma 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. Its wineries are generally well prepared for receiving tourists, and Sonoma Valley offers a wide range of year-round festivals and events, including the prestigious Sonoma International Film Festival. Today, this small valley's wines are protected by the US Federal Government's Sonoma Valley and Carneros AVAs (or American Viticultural Areas).
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.