Unit 37A

May Mountain and Flatiron Mountain provide landmark peaks for orientation and glassing vantage points across the high country. Goat Lake sits in alpine terrain useful for navigation in upper basins. The McKim Creek, Mill Creek, and Snowslide Creek drainages serve as major travel corridors through steep terrain.

Devils Basin offers open country for spotting animals at distance. Red Point and the various gulches—Black Canyon, Spring Gulch, Cronks Canyon—mark side drainages that split off the main river system. These features help hunters locate water and identify terrain features in challenging country.

Terrain spans from around 4,400 feet in river valleys to over 11,300 feet on alpine summits, with most country sitting between 7,000 and 9,500 feet. Lower elevations feature canyon bottoms with riparian vegetation and scattered conifers. Mid-elevation slopes support moderate forest—a mix of spruce-fir and Douglas-fir with open parks and meadows.

Higher ridges transition to sparse timber and alpine terrain with basins like Devils Basin offering open glassing country. The elevation gain across short distances creates dramatic transitions in habitat and seasonal use patterns.

The unit has 435 miles of road network but terrain steepness limits practical vehicle access to valley bottoms and major drainage systems. Most road mileage serves river corridors rather than spreading pressure across the unit. The steep topography means hunters on foot quickly outpace road hunters and access more country.

Complexity score of 8.1 reflects the demanding terrain—navigation and fitness requirements limit casual hunting. The Salmon River drainage attracts attention, but broken terrain and steep terrain filters crowds into specific access points, leaving vast areas of backcountry relatively quiet for prepared hunters.

Unit 37A encompasses the Salmon and Pahsimeroi River drainages in Custer and Lemhi counties, a core section of the Frank Church-Wilderness of No Return region. The unit sits at the heart of central Idaho's high country, with the Salmon River forming a natural corridor through steep canyon walls. Patterson serves as the nearest population center, providing staging for access into the drainage system.

Steep terrain dominates—the unit climbs from river bottoms to alpine ridges across significant elevation change, creating distinct zones and varied hunting opportunities.

Water is the limiting factor in 37A. The Salmon and Pahsimeroi Rivers flow year-round through canyon bottoms but access to them is often steep. Named creeks—McKim, Mill, Mud, Snowslide, and multiple North Forks—provide seasonal flow in their drainages but reliability varies. Graves Spring marks a known water source for trip planning.

Higher basins and ridges can be dry during late season. Hunters must plan water strategy carefully, with knowledge of which creeks hold through fall and where springs exist. Early season offers more water options than late season.

Unit 37A is elk country across all elevations, with animals using different zones seasonally. Early season finds elk in high parks and basins above 8,500 feet where Goat Lake and Devils Basin offer glassing opportunities. Mid-elevation slopes with moderate forest provide transition habitat during rut period, with creeks offering travel corridors.

Late season pushes elk downslope into river valleys and lower drainages where access is easier but hunting pressure concentrates. Water sources—springs and creeks listed throughout drainages—determine hunting patterns. Glassing open ridges works early, but steep terrain favors hunters willing to move vertically through country, working thick timber and benches where elk concentrate.