HD 580 covers the western Pryor Mountains and the country between the Beartooth Front and the Pryors—Big Pryor Mountain and the lower Pryor breaks running down toward the Clarks Fork and the Bighorn River. Elevations run from about 3,800 feet on the Clarks Fork and Bighorn bottoms to over 9,000 feet on Big Pryor Mountain (West Pryor). The country is the same striking limestone-and-dolomite character as the eastern Pryors—dramatic ice caves, juniper-and-mountain mahogany lower slopes, Douglas fir parkland higher up, big rolling parks at the summit, with a high-desert feel through most of it. The Bighorn Canyon NRA cuts the eastern edge with the Yellowtail Reservoir; the canyon walls are spectacular. Pryor Mountain wild horse range overlaps the high country. Mule deer in the timber-juniper transition; mountain lions abundant; some bighorn sheep on the limestone cliffs. The land-ownership reality is the central wrinkle here: the Crow Indian Reservation occupies a major share of the polygon and Crow tribal land is closed to non-tribal hunters without specific tribal permits. The huntable ground for non-tribal hunters is BLM, Custer Gallatin NF, and small private outside the reservation. Read the FWP HD 580 maps and the reservation boundary very carefully. Limited road access via the Pryor Mountain Road from Bridger over the range and the East Pryor Road network. Bridger is the nearest town with gas and basics; Cody WY is south; Lovell WY is southeast. Cell service is gone in the range. The country is hot and dry in early season; plan accordingly. The Pryor mule deer hunt and the high-country horseback experience are unique in MT for hunters willing to figure out the access puzzle.