Unit 21

Key navigation features include Snowshoe Mountain and Medicine Mountain for high-country orientation and glassing. The Medicine Lodge Big Game Winter Range identifies critical habitat in the northern section. Major drainages like Crystal Creek, Cottonwood Creek, and Trout Creek serve as travel corridors and water sources.

Sheep Canyon and Triple Draw offer navigable routes through rough country. Devils Leap and Shell Falls mark distinctive terrain features. These landmarks help hunters navigate the complexity and identify promising terrain for mountain lions in canyon systems and rough breaks.

The unit transitions dramatically from low-elevation sagebrush and grassland benches along the Big Horn River to high-country alpine terrain on the peaks and ridges. Sparse forest characterizes most elevations, with scattered timber in drainages and basin areas. The majority of terrain sits in open country—rolling ridges, expansive parks, and exposed flats.

Meadows and grassy basins like Buffalo Flat, Elk Park, and Red Rim Meadows provide openings within the broader landscape. Water-dependent areas support denser vegetation, but overall the unit reads as big, open, and fairly exposed.

The unit has fair road access with over 1,000 miles of roads, but density is spread across vast terrain, creating significant pockets of solitude. U.S. Highway 16 and local ranch roads provide vehicle staging, but much of the unit demands foot or pack access. Small communities mean lower hunter populations than units near major towns.

The rugged terrain and high complexity score naturally limit casual pressure. Strategic hunters who commit to the work find fewer people, but access requires planning—know which roads are public, scout approaches carefully, and expect to walk long distances from reliable parking.

Unit 21 encompasses the country along the Wyoming-Montana border, bounded by the Big Horn Mountain Divide on the east and the Big Horn River corridor on the west. U.S. Highway 16 crosses through the northern section, providing primary vehicle access. The unit is vast, covering substantial acreage with elevation spanning from around 3,600 feet along the river to over 13,000 feet on the high peaks.

Small communities like Shell, Hyattville, and Manderson sit near the unit boundaries and serve as staging points for hunters.

Water is genuinely limited and requires careful planning. The Big Horn River anchors the western boundary and provides reliable flow. Interior basins include Red Basin, Petes Hole, and Devils Kitchen.

Springs are scattered but significant—Sheep Mountain Springs, White Sulphur Spring, and Johns Spring are named water sources worth knowing. Seasonal creeks like Dry Creek, Sand Creek, and Trout Creek flow during spring and early summer. Reservoirs (Pass Reservoir, Garnett Reservoir, Ewen Reservoir) offer fallback water but may be inaccessible during drought.

Plan water caches or day trips from reliable sources.

Mountain lion habitat dominates this unit's strategy. Rugged canyon systems, dense brushy drainages, and sparse forest create ideal cougar country. Focus on rough, broken terrain where rim rock provides escape routes and narrow draws hold mule deer and elk.

Benches like Dugan Bench and Lowmiller Bench offer vantage points for spotting fresh sign. Winter range (Medicine Lodge area) concentrates game and lions seasonally. Water-dependent draws and spring-fed basins concentrate both prey and predators.

The high-complexity terrain rewards hunters who move slowly, glass extensively, and work drainage systems methodically. Early and late season hunting aligns with peak lion activity in lower elevations.