Skip to content
California Wine Atlas

River Junction

AVA · San Joaquin County · District 11, 12

27 CFR 9.164 · established 2001-05-09

Heat class IV · 1991-2020 normals

Climate normals in three numbers

3,955°F-days

, Apr 1 – Oct 31

4 GridMET cells cover this region

IV

raw 4 km GridMET would say V

61mm

season rain, Apr 1 – Oct 31

18 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

San Joaquin County — not River Junction

loading drought monitor…

What's in the ground

7.2

pH, 1:1 water

22.8cm

, whole profile

198cm

to

Poorly drained

, dominant condition

Distribution across 10 · mean ◆, median │, p10–p90 bar

7.2
2.6%
23.1%
available water
22.8cm
depth to restriction
198cm

Dominant

  • 51.9%
  • 24.5%
  • 21.5%
  • 1.3%
  • 0.5%

10 map units · soil described over 97.8% of the region’s area · 2.2% is water, rock outcrop or other non-soil · 2% of the described area has a restrictive layer within the profile.

Sand, silt and clay, against every other appellation

CLAYSANDSILT

Loam

34% sand · 43% silt · 23% clay

Sandier than 14% of California appellations and clayier than 56%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.

Plus 1% 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

San Joaquin County · District 11, 12

loading acreage…

Price per ton

San Joaquin County · District 11, 12

loading crush report…

The appellation in federal law

The boundary, in the government’s own words (209 words)

(c) Boundaries. The River Junction AVA is located in southern San Joaquin County, California. The boundaries are as follows: (1) Beginning on the Vernalis, CA quadrangle map at the intersection of the secondary highway Airport Way and the San Joaquin River levee, near Benchmark 35 in T3S/R6E; (2) Then in a southeasterly direction, follow the levee along the San Joaquin River onto the Ripon, CA quadrangle map; (3) Then in a northerly direction around Sturgeon Bend in section 18 T3S/R7E; (4) Then continuing in a generally southeasterly, then northeasterly direction along the levee adjoining the Stanislaus River through sections 19, 20 and 17 to the point where the levee intersects sections 17 and 8; (5) Then continuing in a northerly direction along the levee in section 8 for approximately 1,000 feet; (6) Then in a straight line in a northwesterly direction for approximately 100 feet to the intersection with Division Road; (7) Then in a southwesterly, then northwesterly direction along Division Road through sections 8, 17, 18 and 7 to the intersection with the secondary highway Airport Way; (8) Then in a southwesterly direction along Airport Way onto the Vernalis quadrangle map to the starting point at the intersection of Airport Way and the San Joaquin River levee T3S/R6E.