Diamond Mountain District AVA
| Wine region | |
Diamond Mountain District with view to the valley below | |
| Type | American Viticultural Area |
|---|---|
| Year established | 2001 |
| Country | United States |
| Part of | Napa Valley AVA |
| Other regions in Napa Valley AVA | Los Carneros AVA, Howell Mountain AVA, Wild Horse Valley AVA, Stags Leap District AVA, Mt. Veeder AVA, Coombsville AVA Atlas Peak AVA, Spring Mountain District AVA, Oakville AVA, Rutherford AVA, St. Helena AVA, Chiles Valley AVA, Yountville AVA, Oak Knoll District of Napa Valley AVA, Calistoga AVA |
| Soil conditions | volcanic |
| Total area | 5,000 acres (20 km2) |
| Size of planted vineyards | 500 acres (2 km2) |
| Varietals produced | Cabernet Franc, Cabernet Sauvignon, Malbec, Merlot, Petit Verdot, Sauvignon blanc |
Diamond Mountain District is an American Viticultural Area located in California's Mayacamas Mountains in the northwest portion of the Napa Valley AVA. The appellation sits at a higher elevation than most of Napa Valley's wine region, resulting in less cool fog coming in from San Pablo Bay, and more direct exposure to sunlight. The soil of this AVA is volcanic and very porous which allows it to cool down quickly despite the increased sunlight.