San Miguel District AVA
| Wine region | |
| Type | American Viticultural Area |
|---|---|
| Year established | 2014 |
| Years of wine industry | 235 |
| Country | United States |
| Part of | California, Central Coast AVA, San Luis Obispo County, Paso Robles AVA |
| Other regions in California, Central Coast AVA, San Luis Obispo County, Paso Robles AVA | Adelaida District AVA, Creston District AVA, El Pomar District AVA, Paso Robles Estrella District AVA, Paso Robles Geneseo District AVA, Paso Robles Highlands District AVA, Paso Robles Willow Creek District AVA, San Juan Creek AVA, Santa Margarita Ranch AVA, Templeton Gap District AVA |
| Growing season | 266 days |
| Climate region | Region III |
| Heat units | 3600.36 GDD units |
| Precipitation (annual average) | 11.4 in (290 mm) |
| Soil conditions | Deep alluvial soils, with clay, sandy, and gravelly loam textures. |
| Total area | 19,086 acres (30 sq mi) |
| Size of planted vineyards | 1,945 acres (787 ha) |
| No. of vineyards | 11 |
| Grapes produced | Cabernet Sauvignon, Grenache, Merlot, Mourvèdre, Petite Sirah (Durif), Zinfandel |
San Miguel District is an American Viticultural Area (AVA) located in San Luis Obispo (SLO) County, California and lies within the multi-county Central Coast AVA. It was established on October 8, 2014 by the Alcohol and Tobacco Tax and Trade Bureau (TTB), Treasury after reviewing the petitions submitted in 2007 by the Paso Robles American Viticultural Area Committee (PRAVAC) to establish 11 new viticultural areas located entirely within the existing Paso Robles viticultural area adjacent to the northern boundary of San Luis Obispo County. The proposed viticultural areas were: Adelaida District, Creston District, El Pomar District, Paso Robles Estrella District, Paso Robles Geneseo District, Paso Robles Highlands District, Paso Robles Willow Creek District, San Juan Creek, San Miguel District, Santa Margarita Ranch, and Templeton Gap District.
As of 2020, San Miguel District encompasses about 19,086 acres (30 sq mi) with approximately 1,945 acres (787 ha) under vine and encircles the small town of San Miguel located alongside Highway 101 ten miles (16 km) north of the city of Paso Robles as shown on the USGS San Miguel and Paso Robles maps and the 2001 Automobile Club of Southern California road map. The AVA is situated at the northernmost portion of the Paso Robles viticultural area along the San Luis Obispo–Monterey County border where the Salinas River flows across northbound toward the Pacific Ocean into Monterey Bay. The viticultural area has a very mild marine influence, receives an average annual precipitation of 11.4 inches (290 mm), and is considered a warm Winkler Region III climate zone. Alluvial fans and well-defined terraces dominate the landscape of the viticultural area, with elevations ranging from approximately 580 to 1,600 feet (180–490 m).