Henry Mtns (bison), Utah

The Henry Mountains rise abruptly from the surrounding canyon-country desert floor — as low as approximately 4,800 feet in the valley basins — to Mount Ellen at 11,522 feet, with peaks Pennell (11,371 ft) and Hillers (10,737 ft) forming the northern cluster and smaller southern summits Ellsworth (8,235 ft) and Holmes (~8,000 ft) forming the "Little Rockies." The range is geologically a series of laccolith formations with radial drainages cutting deeply incised canyons off the central ridges. Terrain transitions sharply from open desert benches and canyon bottoms to steep, brush-choked gullies and long, rolling alpine tundra summits. Much of the terrain is off-trail and physically demanding; bison occupy both the steep wooded canyons mid-mountain and the lower desert benches depending on season.

The unit is managed almost entirely by the BLM Henry Mountains Field Station, located in Hanksville (380 South 100 West, Hanksville, UT 84734; 435-542-3461). Primary highway access is via Utah Route 24 (east-west through Hanksville) and Utah Route 95 (north-south along the eastern flank). Utah Route 276 branches south from Route 95 and provides access to the southern mountain clusters. From Hanksville, Sawmill Road (100 East Street turning south) winds approximately 23 miles to Lonesome Beaver Campground. The BLM's Bull Creek Pass Backcountry Byway is the central high-elevation corridor crossing the northern cluster and is designated as a National Backcountry Byway; it reaches over 10,000 feet elevation. Three developed BLM campgrounds exist within the range: Lonesome Beaver, McMillan Springs, and Starr Springs, each with pit toilets, picnic tables, fire grills, and seasonal water. All roads other than paved Utah state highways are gravel or dirt; high-clearance vehicles are required throughout, and 4WD is strongly recommended for upper mountain routes and side spurs, which can be impassable due to rockslides or snow. No gas stations, grocery stores, or reliable cell service exist within the unit — all supplies must be brought from Hanksville or further. Private land within the unit is limited to a few hundred acres of mining claims and a few thousand acres of ranch and farmland, typically concentrated along creek bottoms. No CWMUs have been identified within the bison unit boundary. BLM Wilderness Study Areas within or adjacent to the unit include Mount Ellen-Blue Hills, Mount Pennell, and Mount Hillers WSAs.

Vegetation is strongly elevation-stratified across roughly 700 documented plant species. Below 6,000 feet: arid desert shrublands of blackbrush, shadscale, ephedra, yucca, and cactus, transitioning to sparse grasses. From 6,000 to 9,000 feet: pinyon-juniper woodland mixed with big sagebrush on south-facing slopes; ponderosa pine and Douglas-fir appear on cooler north-facing aspects; aspen groves and mountain mahogany occupy protected drainages. Gambel oak and mountain brush communities occur at mid-elevations. Above approximately 10,000 to 10,500 feet: treeline gives way to alpine tundra with cushion plants, sedges, and low shrubs. Bison are documented occupying high alpine meadows and aspen-evergreen canyons in summer and descending to desert benches and lower sagebrush country in winter.

Bison are the primary managed big-game species; the herd numbers 300-400 animals and represents one of the largest free-roaming, genetically pure (no cattle hybridization detected), brucellosis-free plains bison populations on public land in the contiguous United States. The herd was established with 18 animals transplanted from Yellowstone National Park in 1941 and five additional bulls in 1942; the animals initially occupied the Burr Desert/Robbers Roost area before the population migrated to the Henry Mountains by 1963. Unlike classic plains bison, this herd occupies rugged mountain terrain including steep wooded canyons and aspen-evergreen forests, as well as lower desert benches. Seasonal movement is pronounced: animals use high mountain meadows and aspen-fir zones in summer and descend to lower desert benches and sagebrush country in winter. In 2010, 39 animals were transplanted from this herd to the Book Cliffs to seed a new population. Mule deer and pronghorn also inhabit the unit, and mountain lion are documented. Sage grouse, raptors, pikas, and rock squirrels are present in appropriate habitat zones.

Tag quota of 73 is an approximation derived from GoHunt 2025 data reporting individual hunt-type permit counts (archery 4, early bull ~4, late bull ~5+5, early cow 25, late cow 30) — exact annual totals vary and UDWR adjusts quotas annually including drought-year reductions. Season dates confirmed via eRegulations 2025-2026 data. All bison tags are once-in-a-lifetime (no repeat drawing). Muzzleloader is not a distinct bison season in Utah — all legal weapons including muzzleloaders are permitted during any-legal-weapon hunts. Book Cliffs transplant date: Wild About Utah states 2010 (39 animals); Wikipedia notes an earlier private-herd release in 2008 and 31 Henry Mountains animals in 2009 — sources conflict, Wild About Utah figure used. Success rates (87% overall, 93% hunter-choice, 77% cow-only) confirmed by HenryMtnBisonHunts.com historical data. Mule deer, pronghorn, and mountain lion are present geographically but managed under separate unit boundaries and are not huntable under this bison-specific unit designation.