North American Wine Regions: Northern California
The terrain and climate of the wine areas of Northern California remind the visitor of nothing so much as rural France. But the scale is vastly smaller — Napa Valley is only 35 miles long and 5 miles wide, while Sonoma County covers 1,600 square miles along 60 miles of coastline — with only a few hundred wineries sited there. Farthest north is Mendocino County with 30 wineries of its own, whose 3,500 square miles of cool climate helps create Chardonnay and Pinot Noir.

