Big Valley District-Lake County AVA

Big Valley District-Lake County is an American Viticultural Area located in Lake County, California. There were 6 wineries within the viticultural area, as well as 43 commercially-producing vineyards covering approximately 1800 acre when officially established by the Alcohol and Tobacco Tax and Trade Bureau (TTB) in October 2013 alongside the adjacent Kelsey Bench AVA. Big Valley District is in a large valley near Clear Lake, the Mayacamas mountain range, and the Mount Konocti volcano. The AVA is in the less hilly area near Kelseyville; the hillier areas are  part of the Kelsey Bench. Big Valley is a structural basin that is part of the larger Clear Lake basin.

Sauvignon blanc makes up the majority of the region's plantings in addition to Zinfandel and Cabernet Franc.