Tags: Wine Region.
The San Ysidro District AVA is an American Viticultural Area located in Santa Clara County California. It is part of the larger Santa Clara Valley AVA and is located in the foothills of the Diablo Range. San Ysidro District is significantly cooler than other parts of Santa Clara Valley. Cooling breezes can reach the area via the Pajaro River which cuts into the nearby foothills.