They are on gently sloping to steep, convex, dissected uplands. Slopes range from 0 to 70 percent.
Permeability is moderate.
Mean annual precipitation is 43 inches. Gilpin channery silt loam - cultivated. Solum thickness ranges from 18 to 36 inches. Fractured, bedded and rippable bedrock is at depths of 20 to 40 inches. Rock fragments are mostly angular to subangular channers of shale, siltstone and sandstone and comprise 5 to 40 percent of individual horizons of the solum and 30 to 90 percent of the C horizon.