Wild Horse Valley
Sub-AVA · Solano County · District 5 — 65.43% of this appellation; also in Napa (34.57%)
27 CFR 9.124 · established 1988-11-30
Heat class IV · 1991-2020 normals
Climate normals in three numbers
, Apr 1 – Oct 31
4 GridMET cells cover this region
season rain, Apr 1 – Oct 31
45 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
Solano County — not Wild Horse Valley
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What's in the ground
6.2
pH, 1:1 water
5.0cm
, whole profile
44cm
to
Well drained
, dominant condition
Distribution across 21 · mean ◆, median │, p10–p90 bar
Dominant
- 40.9%
- 40.2%
- 14.0%
- 1.7%
- 1.4%
21 map units · soil described over 96.3% of the region’s area · 14.8% is water, rock outcrop or other non-soil · 98% of the described area has a restrictive layer within the profile.
Sand, silt and clay, against every other appellation
Loam
41% sand · 38% silt · 21% clay
Sandier than 44% of California appellations and clayier than 39%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.
Plus 36% 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
Solano County · District 5 — 65.43% of this appellation; also in Napa (34.57%)
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Price per ton
Solano County · District 5 — 65.43% of this appellation; also in Napa (34.57%)
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The appellation in federal law
The boundary, in the government’s own words (328 words)
(c) Boundaries. The boundaries of the Wild Horse Valley viticultural area (in Napa and Solano Counties) are as follows: (1) The beginning point is on the section line boundary between Section 33, Range 3 West, Township 6 North and Section 4, Range 3 West, Township 5 North, Mount Diablo Range and Meridian, marked with an elevation of 1,731 feet, which is a northwest corner of the boundary between Napa and Solano Counties. (2) From the beginning point, the boundary runs in a north-northeasterly direction approximately .9 mile to the summit of an unnamed hill having a marked elevation of 1,804 feet; (3) Then northeasterly approximately .7 mile to the summit of an unnamed hill having a marked elevation of 1,824 feet; (4) Then south-southeasterly approximately .6 mile to the summit of an unnamed hill having a marked elevation of 1,866 feet; (5) Then south-southeasterly approximately .5 mile to the summit of an unnamed hill having a marked elevation of 2,062 feet; (6) Then southerly approximately .7 mile to the summit of an unnamed hill having a marked elevation of 2,137 feet; (7) Then south-southeasterly approximately .4 mile to the summit of an unnamed hill having a marked elevation of 1,894 feet; (8) Then southerly approximately 2.3 miles to the midpoint of the section line boundary between Sections 15 and 22, Township 5 North, Range 3 West, Mount Diablo Range and Meridian; (9) Then southwesterly approximately 1.3 miles to the summit of an unnamed hill having a marked elevation of 1,593 feet; (10) Then west-northwesterly approximately 1.2 miles to the summit of an unnamed hill, on the Napa/Solano County boundary, having a marked elevation of 1,686 feet; (11) Then north-northeasterly approximately 1.5 miles to the summit of an unnamed hill having a marked elevation of 1,351 feet; (12) Then north-northeasterly approximately 1.2 miles to the summit of an unnamed hill having a marked elevation of 1,480 feet; and (13) Then north-northwesterly approximately 1.0 miles to the point of beginning.