Elevations range from 800 to 2,200 feet. The climate is characterized by hot, dry summers and cool, moist winters. Average annual precipitation ranges from 9 to 12 inches. The frost-free period is 140 to 180 days. These are the Malott , Peshastin , Roosevelt , Soaplake , and Skaha soils, and the competing Bakeoven soils.
Malott soils are very deep and coarse-loamy.
Peshastin soils are very deep and loamy-skeletal. Roosevelt soils are moderately deep to a lithic contact and are coarse-loamy. Soaplake soils are loamy. Skaha soils are very deep and are sandy-skeletal. Livestock grazing, wildlife habitat, and watersheds are the principal uses.