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California Wine Atlas

Inwood Valley

AVA · Shasta County · District 9

27 CFR 9.226 · established 2012-09-13

Heat class V · 1991-2020 normals

Climate normals in three numbers

4,078°F-days

, Apr 1 – Oct 31

16 GridMET cells cover this region

V

raw 4 km GridMET would say IV

241mm

season rain, Apr 1 – Oct 31

70 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

Measured vineyard area

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Drought categories, year by year

Shasta County — not Inwood Valley

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What's in the ground

6.1

pH, 1:1 water

16.6cm

, whole profile

108cm

to

Well drained

, dominant condition

Distribution across 76 · mean ◆, median │, p10–p90 bar

6.1
4.3%
23.2%
available water
16.6cm
depth to restriction
108cm

Dominant

  • 24.6%
  • 19.6%
  • 12.8%
  • 9.5%
  • 6.2%

76 map units · soil described over 98.1% of the region’s area · 5.9% is water, rock outcrop or other non-soil · 72% of the described area has a restrictive layer within the profile.

Sand, silt and clay, against every other appellation

CLAYSANDSILT

Loam

42% sand · 35% silt · 23% clay

Sandier than 48% of California appellations and clayier than 58%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.

Plus 25% 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

Shasta County · District 9

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Price per ton

Shasta County · District 9

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The appellation in federal law

The boundary, in the government’s own words (554 words)

(c) Boundary. The Inwood Valley viticultural area is located in Shasta County, California. The boundary of the Inwood Valley viticultural area is as described below: (1) The beginning point is on the Clough Gulch map at BM (Benchmark) 1254.4 located along State Route 44 in T31N/R2W. From the beginning point, proceed east-northeasterly in a straight line approximately 4.1 miles, onto the Inwood map, to the 1,786-foot elevation point, section 17, T31N/R1W; then (2) Proceed east-northeasterly in a straight line approximately 2.1 miles to the 2,086-foot elevation point, section 15, T31N/R1W; then (3) Proceed north-northeasterly in a straight line approximately 0.7 mile to the marked 1,648-foot elevation point (which should be marked as 2,648 feet based on its two adjacent elevation lines) on Bear Creek Ridge, section 10, T31N/R1W; then (4) Proceed east-northeasterly in a straight line approximately 0.8 mile to the 2,952-foot elevation point (located between two transmission lines), section 11, T31N/R1W; then (5) Proceed east-northeasterly in a straight line approximately 1.2 miles to the 3,042-foot summit of Blue Mountain, section 1, T31N/R1W; then (6) Proceed easterly in a straight line approximately 0.7 mile, crossing over the R1W/R1E “Mt. Diablo Meridian” line, to the 3,104-foot elevation point, section 6, T31N/R1E; then (7) Proceed east-northeasterly in a straight line approximately 2.2 miles to the summit of Alamine Peak, section 32, T32N/R1E; then (8) Proceed southeasterly in a straight line approximately 2.1 miles, onto the Hagaman Gulch map, to Bear Pen Springs, section 10, T31N/R1E; then (9) Proceed west-southwesterly in a straight line approximately 0.8 mile to the 3,373-foot summit of Chalk Mountain, section 9, T31N/R1E; then (10) Proceed south-southwesterly in a straight line approximately 1 mile, returning to the Inwood map, to 2,756-foot elevation point, section 17, T31N/R1E; then (11) Proceed south in a straight line approximately 0.6 mile to the intersection of that line with an improved road marked “Private” at the southern boundary of section 17, T31N/R1E; then (12) Proceed south-southwesterly along that “Private” road approximately 1.6 miles to the marked gate of the “Private” road at the road's intersection with unnamed improved and unimproved roads, section 29, T31N/R1E; then (13) Proceed southwesterly in a straight line approximately 1.6 miles, onto the Shingletown map, to the intersection of that line with State Route 44 and an unnamed improved road (known locally as Ash Creek Road), section 31, T31N/R1E; then (14) Proceed southwesterly in a straight line approximately 0.2 miles to the 3,334-foot elevation point, section 31, T31N/R1E; then (15) Proceed southwesterly in a straight line approximately 1.5 miles, crossing over the R1W/R1E “Mt. Diablo Meridian” line, to the 3,029-foot elevation point on Shingletown Ridge, section 1, T30N/R1W; then (16) Proceed westerly in a straight line approximately 1.6 miles to the 2,435-foot elevation point, section 3, T30N/R1W; then (17) Proceed west-southwesterly in a straight line approximately 1.7 miles to the 2,065-foot elevation point (southeast of a marked Borrow Pit), section 8, T30N/R1W; then (18) Proceed west-northwesterly in a straight line approximately 5.2 miles, onto the Tuscan Buttes NE map, to the 956-foot elevation point near an unnamed spring in section 33, T31N/R2W; then (19) Proceed north in a straight line approximately 1.7 miles, onto the Clough Gulch map, to BM 1048.1 on State Route 44, section 28, T31N/R2W; then (20) Proceed east along State Route 44 approximately 1.1 miles, returning to the beginning point.