San Francisco Bay California The San Francisco Bay AVA encompasses the southern San Francisco Bay area and encompasses many smaller AVAs. It includes all of San Francisco, San Mateo, Santa Clara, Alameda and Contra Costa Counties and some of Santa Cruz and San Benito Counties and is emcompassed by the larger Central Coast AVA. Vineyards & Wineries: Rosenblum Cellars Wente Vineyards Regions within this AVA: Alameda County Contra Costa County Livermore Valley Pacheco Pass San Mateo County Santa Clara County Santa Clara Valley