With warm sun and cool breezes in just the right measure, and exceptionally diverse soil types, the beautiful, 20-mile-long basin known as the Alexander Valley is a winemaker's paradise — and our home. Just over an hour north of San Francisco, in northern Sonoma County, Clos du Bois proudly carries on an Alexander Valley winemaking tradition that, for us, stretches back more than 30 years. A tradition of the highest quality grapes and the finest round, supple wines. A tradition you can taste in every bottle of Clos du Bois.