With a profusion of grape varietals and something of a reputation for success in warm-climate viticulture, this AVA on the outskirts of San Diego is a land teeming with orchards, pastures and part of San Diego's famous zoo.

Although the area has only two wineries, vineyards are planted to a mixture of varietals, including award-winning Syrah and Viognier, as well as Tempranillo, Grenache, Merlot and Sangiovese. Even though it’s located in California’s southernmost county, the valley enjoys its proximity to the Pacific Ocean.

Cooled by offshore breezes, the valley rarely reaches temperatures exceeding 95 degrees F. The region benefits from well-drained, granite-based soils, and cool evening temperatures, preserving acidity and color. (Wine/Appellations)