The Tracy Hills AVA is an American Viticultural Area located approximately 55 miles (89 km) east-southeast from San Francisco in both San Joaquin County and Stanislaus County, California. The 40,000 acres (16,187 ha) region was designated an AVA as a result of a petition from the owners of in Lake County, who owned a vineyard on Mount Oso in the Tracy Hills. The five original vineyards in the appellation are planted between 100–500 feet (30–152 m) above sea level. The best known wines from Tracy Hills vineyards are the range of Italian varietal wines produced by Jacuzzi Family Vineyards who are based in Sonoma. The sloping hillside topography includes streams and alluvial fans and plains. The distinguishing climatic features of the proposed area include limited rainfall and persistent win