Wapinitia soils are deep and have an argillic horizon. Watama soils are moderately deep and are fine-loamy. Wrentham soils are on steep north-facing slopes and are deeper than 20 cm to bedrock. In a few places the soil is ponded for short periods. Most of the soil is used for range.
Native vegetation is bunchgrasses, forbs, and shrubs.
This series is extensive.