The Diablo Grande AVA is an American Viticultural Area

American Viticultural Area

An American Viticultural Area is a designated wine grape-growing region in the United States distinguishable by geographic features, with boundaries defined by the Alcohol and Tobacco Tax and Trade Bureau , United States Department of the Treasury....

 located in Stanislaus County

Stanislaus County, California

Stanislaus County is a county located in the Central Valley of the U.S. state of California. As the price of housing has increased in the San Francisco Bay Area, many people who work in the southern reaches of the Bay Area have opted for the longer commute and moved to Stanislaus County for the...

, California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

. All
30000 acres (12,141 ha) in the AVA are owned by the Diablo Grande Resort Community, and Isom Ranch Winery is the only winery producing wines that carry the Diablo Grande AVA designation on their labels. Vineyard

Vineyard

A vineyard is a plantation of grape-bearing vines, grown mainly for winemaking, but also raisins, table grapes and non-alcoholic grape juice...

s in the AVA are planted between 1000 feet (304.8 m) and 1800 feet (548.6 m) above sea level. The region is named after nearby Mount Diablo, the highest peak in the Pacific Coast Range.