HD 390 covers the upper Missouri Breaks east of Fort Benton—the dramatic canyon-and-coulee country where the Missouri River cuts through the Upper Missouri River Breaks National Monument. Elevations run from about 2,500 feet on the river bottom up to 3,800 feet on the bench-top prairie. The country is the textbook Missouri Breaks landscape: deeply eroded sandstone-and-shale coulees, juniper-and-ponderosa pine timbered draws, gumbo ridges, badland buttes, and cottonwood bottoms along the river. Most of the unit is north of the Missouri itself in the country between Fort Benton, Big Sandy, and Loma. The named features include the white cliffs section visible from the river, Eagle Creek, Arrow Creek, and Antelope Creek drainages. Mule deer use the breaks and the timbered draws; whitetail concentrate in the river bottom and the irrigated cottonwood patches; elk live the breaks in real numbers (this is one of the better Breaks elk units); pronghorn on the bench tops; bighorn sheep on the rugged limestone faces near the river. BLM administers most of the public ground as part of the Upper Missouri River Breaks National Monument (designated 2001), with CMR refuge ground further east, DNRC state sections, and significant private ranch ground at the bench tops. Road access is sparse—a handful of two-track gumbo roads from US-87 and county routes drop into the breaks. Stafford Ferry and Coal Banks Landing are the principal river access points. Fort Benton has gas, motels, the old Grand Union Hotel; Big Sandy has gas and basics. Cell service is gone basically everywhere in the breaks. Gumbo when wet is no joke—plan around weather. The pack-out from the bottom of the breaks to a parking area is a real piece of work. Self-sufficient hunters get rewarded.