The North Coast AVA is an American Viticultural Area in the state of California that encompasses grape-growing regions in six counties located north of San Francisco: Lake, Marin, Mendocino, Napa, Sonoma, and Solano. This large appellation covers over 3,000,000 acres (12,000 km2) and includes a number of smaller sub-appellations that all share the common ecology trait of having its weather affected by the cool fog and breezes of the Pacific Ocean.