General Soil Map Units
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Soils That Are in Valleys and Formed in Ash and Pumice Flow Deposits of Ash, Pumice, and Cinders
Number of map units: 4
Percentage of park: 42 percent
7. Castlecrest (Shasta red fir)
Percentage of park: 5 percent
Location in park: Eastern and southern valleys and lowlands
Slope range: 0 to 35 percent
Elevation: 5,000 to 6,500 feet
Average annual precipitation: 40 to 60 inches
Average annual air temperature: 38 to 42 degrees F
Frost-free period: 0 to 50 days
Minor components: 3 percent Cleetwood soils, 5 percent Sunnotch soils, and 7 percent Unionpeak soils
Present vegetation: Shasta red fir and lodgepole pine
Castlecrest soils
Depth class: Very deep
Drainage class: Somewhat excessively drained
Permeability: Rapid
Position on landscape: Mountain flanks and mountainsides
Parent material: Pumice and ash
Surface and subsoil texture: Paragravelly ashy loamy sand
Substratum texture: Ashy coarse sand and ashy sand
