Lake County sits just north of Napa surrounding Clear Lake, the largest natural lake in California, and is known for its high-altitude wine production. Kelsey Bench forms an arc of rich, volcanic soils at more than 1900 feet elevation around Mount Konocti, a dormant volcano in the Pacific Rim chain. These elevations lead to a later start in the growing season with summer days that are suitably warm with rapid cooling in the evening.