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California Wine Atlas

Cosumnes River

AVA · Sacramento County · District 9, 11, 17

27 CFR 9.198 · established 2006-07-17

Heat class IV · 1991-2020 normals

Also part ofLodi

Climate normals in three numbers

3,885°F-days

, Apr 1 – Oct 31

24 GridMET cells cover this region

IV

raw 4 km GridMET would say V

81mm

season rain, Apr 1 – Oct 31

25 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

Sacramento County — not Cosumnes River

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What's in the ground

6.5

pH, 1:1 water

13.4cm

, whole profile

90cm

to

Moderately well drained

, dominant condition

Distribution across 39 · mean ◆, median │, p10–p90 bar

6.5
1.0%
26.6%
available water
13.4cm
depth to restriction
90cm

Dominant

  • 57.7%
  • 12.8%
  • 8.0%
  • 5.5%
  • 5.4%

39 map units · soil described over 98.3% of the region’s area · 2.1% is water, rock outcrop or other non-soil · 82% of the described area has a restrictive layer within the profile.

Sand, silt and clay, against every other appellation

CLAYSANDSILT

Loam

30% sand · 43% silt · 27% clay

Sandier than 6% of California appellations and clayier than 80%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.

Plus 3% 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

Sacramento County · District 9, 11, 17

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Price per ton

Sacramento County · District 9, 11, 17

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The appellation in federal law

The boundary, in the government’s own words (312 words)

(c) Boundary. The Cosumnes River viticultural area is located in Sacramento County, California, and is entirely within the Lodi viticultural area (27 CFR 9.107). The Cosumnes River viticultural area boundary is as follows— (1) The beginning point is on the Bruceville map at the intersection of the Mokelumne River and Interstate Highway 5, T5N, R5E. From the beginning point, proceed north 8.5 miles along Interstate 5 to its intersection with an unnamed light duty road, locally known to the west of Franklin as Hood-Franklin Road, section 18, T6N, R5E (Florin Quadrangle); then (2) Proceed east 1.2 miles straight on Hood-Franklin Road to its intersection with Franklin Boulevard in the village of Franklin, section 17, T6N, R5E (Florin Quadrangle); then (3) Proceed north 4.3 miles on Franklin Boulevard to its intersection with Sims Road on the west and Sheldon Road to the east at the northwest corner of section 28, T7N, R5E (Florin Quadrangle); then (4) Proceed east 2.4 miles on Sheldon Road to its intersection with State Route 99 at the northern boundary section 26, T7N, R5E (Florin Quadrangle); then (5) Proceed south-southeast 6 miles on State Route 99, crossing over the Elk Grove map, to the road's intersection with the Southern Pacific railway line at McConnell, section 20, T6N, R6E (Galt Quadrangle); then (6) Proceed south-southeast 8.7 miles along the Southern Pacific railway line to its intersection with Kost Road, section 34, T5N, R6E (Lodi North Quadrangle); then (7) Proceed west and then north 3.8 miles on Kost Road to its intersection with New Hope Road, T5N, R6E (Lodi North Quadrangle); then (8) Proceed west then south 2.8 miles on New Hope Road to its intersection with the Mokelumne River and the Sacramento-San Joaquin County line, T5N, R5E (Thornton Quadrangle); and (9) Proceed northerly then westerly (downstream) for about 2.7 miles along the meandering Mokelumne River, returning to the beginning point.