Diablo Grande AVA
| Wine region | |
Stanislaus County AVAs | |
| Type | American Viticultural Area |
|---|---|
| Year established | 1998 |
| Country | United States |
| Part of | California, Stanislaus County |
| Other regions in California, Stanislaus County | Tracy Hills AVA, Salado Creek AVA, Paulsell Valley AVA |
| Growing season | 291 days |
| Climate region | Region I-V |
| Heat units | 2,130–5,562 GDD |
| Precipitation (annual average) | 14.65 in (372 mm) |
| Soil conditions | Arburua, Wisflat sandy, Contra Costa clay, and San Timoteo sandy loams |
| Total area | 30,000 acres (47 sq mi) |
| Size of planted vineyards | 52 acres (21 ha) |
| No. of vineyards | 1 |
| Grapes produced | Barbera, Cabernet Sauvignon, Chardonnay, Merlot, Pinot noir, Sangiovese, Sauvignon Blanc, Syrah |
| No. of wineries | 1 |
Diablo Grande is the initial American Viticultural Area (AVA) located in Stanislaus County, California surrounding the unincorporated community of Diablo Grande. The wine appellation was established as the nation's 141st and the state's 80th AVA on June 22, 1998, by the Bureau of Alcohol, Tobacco and Firearms (ATF), Treasury after reviewing the petition submitted by Dr. Vincent E. Petrucci, Sc.D., on behalf of the Diablo Grande Limited Partnership, proposing a new viticultural area located in the western foothills of Stanislaus County, California, to be known as "Diablo Grande."
The entire 30,000-acre (47 sq mi) viticultural area uniquely is private property owned by the Diablo Grande Resort Community, as a gated-residential community including the Legends West at Diablo Grande 18-hole golf course designed by Jack Nicklaus. Its resident vineyards are located at elevations between 1,000 and 1,800 feet (300 and 550 m) above sea level and Isom Ranch Winery solely uses the Diablo Grande appellation on its labels. The plant hardiness zones are 9b and 10a.