Slopes are 0 to 15 percent. Elevations are 3,800 to 5,300 feet. The mean annual precipitation ranges from 10 to 14 inches, half of which falls as rain and snow from late March through June. The frost-free season is about 105 to 130 days. These are the Ulm and Wibaux soils.
Ulm soils are fine.
Wibaux soils are loamy-skeletal over fragmental and lack argillic horizons. These soils are utilized for rangeland and wildlife habitat. The native vegetation is mainly western wheatgrass, needleandthread, blue grama, and green needlegrass. Teckla soils occur in northeast Wyoming. The series is of limited extent.