The Upper Lake Valley AVA's terroir features volcanic and alluvial soils, a warm Mediterranean climate with cooling lake breezes, and gently sloping terrain, ideal for producing robust red varietals like Cabernet Sauvignon and Zinfandel.
The Upper Lake Valley AVA, established in 2022, is home to some of Lake County’s oldest vineyards, with Zinfandel vines dating back to the late 19th century, showcasing the region’s rich viticultural heritage.