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California Wine Atlas

Stags Leap District

Sub-AVA · Napa County · District 4

27 CFR 9.117 · established 1989-01-27 · last amended 2024-11-06

Heat class III · 1991-2020 normals

Climate normals in three numbers

3,225°F-days

, Apr 1 – Oct 31

5 GridMET cells cover this region

III

raw 4 km GridMET would say IV

113mm

season rain, Apr 1 – Oct 31

36 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

This boundaryClick to open

Hovering a shaded region names it; a click opens its page.

Measured vineyard area

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Drought categories, year by year

Napa County — not Stags Leap District

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What's in the ground

6.2

pH, 1:1 water

15.5cm

, whole profile

144cm

to

Well drained

, dominant condition

Distribution across 26 · mean ◆, median │, p10–p90 bar

6.2
4.2%
25.3%
available water
15.5cm
depth to restriction
144cm

Dominant

  • 31.5%
  • 15.9%
  • 12.3%
  • 7.5%
  • 6.8%

26 map units · soil described over 97.9% of the region’s area · 9.8% is water, rock outcrop or other non-soil · 44% of the described area has a restrictive layer within the profile.

Sand, silt and clay, against every other appellation

CLAYSANDSILT

Loam

36% sand · 39% silt · 25% clay

Sandier than 19% of California appellations and clayier than 75%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.

Plus 16% 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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Producers

A curated roster, not a census — only source-verified entries appear, 2772 published across the atlas.

Bearing acreage by variety

Napa County · District 4

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Price per ton

Napa County · District 4

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The appellation in federal law

The boundary, in the government’s own words (236 words)

(c) Boundaries. The Stags Leap District viticultural area is located in Napa County, California, within the Napa Valley viticultural area. The boundaries are as follows: (1) Commencing at the intersection of the intermittent stream (drainage creek) with the Silverado Trail at the 60 foot contour line in T6N/R4W, approximately 7 miles north of the city of Napa. (2) Then southwest in a straight line, approximately 900 feet, to the main channel of the Napa River. (3) Then following the main branch of the Napa River (not the southern branch by the levee) in a northwesterly then northerly direction, until it intersects the medium-duty road (Grant Bdy) in T7N/R4W, known locally as the Yountville Cross Road. (4) Then northeast along the Yountville Cross Road until it intersects the medium-duty road, the Silverado Trail. (5) Then north along the Silverado Trail approximately 590 feet to a gully entering the Silverado Trail from the east. (6) Then northeast along the center line of that gully, approximately 800 feet, until it intersects the 400 foot contour line in Section 30 of T7N/R4W. (7) Then in a generally southeast direction, following the 400 foot contour line through Sections 29, 32, 33, 4, and 3, until it intersects the intermittent stream in the southwest corner of Section 3 in T6N/R4W. (8) Then in a generally southwest direction along that intermittent stream to the beginning point, at the intersection with the Silverado Trail.