HD 391 covers the central Missouri Breaks south of the Missouri River through the heart of the Charles M. Russell National Wildlife Refuge—the CMR. Elevations run from about 2,400 feet on Fort Peck Reservoir and the lower river to 3,500 feet on the bench-top prairie. The country is classic CMR Breaks: deeply eroded badlands, sandstone-and-shale coulees, gumbo ridges, ponderosa-pine timbered draws on north aspects, sage flats and juniper benches, and cottonwood bottoms along the few year-round creek drainages. The CMR is one of the largest wildlife refuges in the lower 48 (about 1.1 million acres) and was set aside in 1936 specifically for wildlife. Elk, mule deer, whitetail in the river bottoms, pronghorn on the prairie, bighorn sheep transplanted onto the refuge in the 1980s and now thriving—some of the best public-land elk hunting in eastern Montana lives here, and the bighorn tags are coveted draws. CMR Refuge land is the dominant ownership, with BLM in scattered tracts, DNRC state sections, and private ranch ground on the bench tops. Refuge regulations apply on the CMR ground itself—non-toxic shot for waterfowl, no permanent stands, specific access rules—read them carefully. Roads from US-191 (the spine north-south through the unit) and from MT-200 to the south drop into the breaks; nearly all are gumbo when wet and impassable for days after rain. Jordan to the east is the nearest town with gas, the courthouse, the Garfield County Bank; Lewistown is southwest and the bigger supply hub. Cell service is essentially gone in the breaks. The country can absolutely punish unprepared hunters—long pack-outs, bad weather, dry creekbeds where you expected water. For self-sufficient hunters it's some of the best public-land hunting in the state.