Oster Wine Cellars is a small family-owned winery in California's Mendocino County. Established in 2002 by Teresa Fetzer Oster and Ken Oster. Oster specialize in Cabernet Sauvignon, producing approximately 1000 cases annually from their own estate grown, CCOF certified organic vineyards, located in Redwood Valley. From San Francisco, Oster Wine Cellars are a 2.5 hour drive north on the beautiful Redwood Hwy 101 and are available for private tastings.