Skip to content
California Wine Atlas

Yorkville Highlands

Sub-AVA · Mendocino County · District 1

27 CFR 9.159 · established 1998-04-07

Heat class III · 1991-2020 normals

Climate normals in three numbers

3,283°F-days

, Apr 1 – Oct 31

22 GridMET cells cover this region

III

205mm

season rain, Apr 1 – Oct 31

70 mm of it in the , Sep 1 – Oct 31

Warm and cool vintages since 1980

loading vintages…

Rain across the season, and at harvest

loading vintages…

The boundary

This boundaryClick to open

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

Measured vineyard area

loading crop mapping…

Drought categories, year by year

Mendocino County — not Yorkville Highlands

loading drought monitor…

What's in the ground

6.3

pH, 1:1 water

15.7cm

, whole profile

127cm

to

Well drained

, dominant condition

Distribution across 64 · mean ◆, median │, p10–p90 bar

6.3
3.7%
22.0%
available water
15.7cm
depth to restriction
127cm

Dominant

  • 38.2%
  • 20.4%
  • 8.4%
  • 7.8%
  • 6.5%

64 map units · soil described over 100.0% of the region’s area · 1.5% is water, rock outcrop or other non-soil · 62% of the described area has a restrictive layer within the profile.

Sand, silt and clay, against every other appellation

CLAYSANDSILT

Loam

42% sand · 36% silt · 22% clay

Sandier than 49% of California appellations and clayier than 48%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.

Plus 13% rock fragments by volume, which the triangle does not describe — the three fractions are of the fine-earth material only.

Elevation, slope and aspect

loading terrain…

Bearing acreage by variety

Mendocino County · District 1

loading acreage…

Price per ton

Mendocino County · District 1

loading crush report…

The appellation in federal law

The boundary, in the government’s own words (273 words)

(c) Boundary. The Yorkville Highlands viticultural area is located in Mendocino County, California. The boundary is as follows: (1) The beginning point is Benchmark 680, located in Section 30, T. 12 N., R. 13 W., on the Ornbaum Valley quadrangle map; (2) From the beginning point, the boundary proceeds in a straight line in a northeasterly direction to a point intersecting the North Fork of Robinson Creek and the Section 20, T. 13 N., R. 13 W.; (3) The boundary then proceeds in a straight line in a southeasterly direction to the summit of Sanel Mountain, located at the southeast corner of Section 30, T. 13 N., R. 12 W., on the Yorkville quadrangle map; (4) The boundary then proceeds in a straight line in a southeasterly direction until it reaches the southeast corner of Section 15, T. 12 N., R 11 W., on the Hopland quadrangle map; (5) The boundary then proceeds south, following the eastern boundaries of Sections 22 and 27, T. 12 N., R 11 W., until it reaches the Mendocino-Sonoma County line on the Cloverdale quadrangle map; (6) The boundary then follows the Mendocino-Sonoma county line west, south and west until it reaches the southwest corner of Section 32, T. 12 N., R. 11 W.; (7) The boundary then diverges from the county line and proceeds in a northwesterly direction, traversing the Big Foot Mountain quadrangle map, until it reaches the southwest corner of Section 5, T. 12 N., R. 13 W. on the Ornbaun Valley quadrangle map; (8) The boundary proceeds in a straight line in a northerly direction until it reaches the beginning point at Benchmark 680.