San Miguel District
Sub-AVA · San Luis Obispo County · District 8
27 CFR 9.246 · established 2014-10-09
Heat class IV · 1991-2020 normals
Climate normals in three numbers
, Apr 1 – Oct 31
10 GridMET cells cover this region
season rain, Apr 1 – Oct 31
17 mm of it in the , Sep 1 – Oct 31
Warm and cool vintages since 1980
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Rain across the season, and at harvest
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The boundary
Hovering a shaded region names it; a click opens its page.
Measured vineyard area
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Drought categories, year by year
San Luis Obispo County — not San Miguel District
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What's in the ground
7.5
pH, 1:1 water
14.0cm
, whole profile
111cm
to
Well drained
, dominant condition
Distribution across 40 · mean ◆, median │, p10–p90 bar
Dominant
- 40.8%
- 20.8%
- 15.6%
- 6.0%
- 5.8%
40 map units · soil described over 100.0% of the region’s area · 1.6% is water, rock outcrop or other non-soil · 65% of the described area has a restrictive layer within the profile.
Sand, silt and clay, against every other appellation
Loam
44% sand · 33% silt · 23% clay
Sandier than 60% of California appellations and clayier than 52%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.
Plus 11% rock fragments by volume, which the triangle does not describe — the three fractions are of the fine-earth material only.
Elevation, slope and aspect
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Bearing acreage by variety
San Luis Obispo County · District 8
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Price per ton
San Luis Obispo County · District 8
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The appellation in federal law
The boundary, in the government’s own words (349 words)
(c) Boundary. The San Miguel District is located in San Luis Obispo County, California. The boundary of the San Miguel District is as described below: (1) The beginning point is on the San Miguel map at the intersection of U.S. Highway 101 and the San Luis Obispo-Monterey County boundary line, section 1, T25S/R11E. From the beginning point, proceed east along the San Luis Obispo-Monterey County line approximately 5.9 miles to the county line's intersection with San Jacinto Creek, section 1, T25S/R12E; then (2) Proceed south-southwesterly (downstream) along San Jacinto Creek for approximately 6.5 miles, crossing on to the Paso Robles map, to the creek's confluence with the Estrella River, section 26, T25S/R12E; then (3) Proceed southerly (upstream) 0.7 mile along the main channel of the Estrella River to the river's intersection with the southern boundary line of section 26, T25S/R12E; then (4) Proceed west along the southern boundary lines of sections 26, 27, and 28, T25S/R12E, approximately 1.85 miles to the section 28 boundary line's intersection with the Salinas River; then (5) Proceed southerly (upstream) along the main channel of the Salinas River approximately 1.6 miles to the river's intersection with an unnamed light-duty road locally known as Wellsona Road, section 4, T26S/R12E; then (6) Proceed west then northwesterly on Wellsona Road approximately 2 miles to the road's intersection with San Miguel Road (locally known as San Marcos Road), section 6, T26S/R12E; then (7) Proceed west-southwesterly on San Miguel Road (locally known as San Marcos Road) approximately 2.6 miles, crossing onto the Adelaida map, to the road's intersection with the eastern boundary line of the Camp Roberts Military Reservation (approximately 400 feet east of the road's intersection with Generals Road), section 2, T26S/R11E; then (8) Proceed northerly along the meandering eastern boundary line of the Camp Roberts Military Reservation (approximately 6.3 miles in straight line distance), crossing onto the San Miguel map, to the intersection of the military reservation's boundary line with U.S. Highway 101 near the northeast corner of section 7, T25S/R12E; then (9) Proceed northwesterly on U.S. Highway 101 approximately 1.55 miles, returning to the beginning point.