The San Pasqual Valley AVA is an American Viticultural Area in northernmost San Diego County, California. It is located in the San Pasqual Valley of the Peninsular Ranges, in Southern California.San Pasqual Valley was the fourth wine region to be designated an American Viticultural Area when the AVA was created in 1981. The AVA is encroached on by the cities of San Diego, Poway, and Escondido, resulting in relatively high land values and limiting viticultural potential.