North Slope, Three Corners, Utah

High desert plateau with flat rolling ridges, shallow creek drainages, and valley bottoms, transitioning to steeper canyon walls where Flaming Gorge Reservoir and the Green River cut the southern boundary. Elevations range from approximately 5,400 feet along the Green River and Browns Park bottoms to roughly 9,000–9,300 feet on the higher plateau benchlands. Bear Top Mountain and Clay Basin Bench are named winter-range areas identified in UDWR management documents (Bear Top Mountain noted as in poor condition due to abundance of annual grasses; Clay Basin Bench in very poor condition due to lack of browse and perennial grasses as of the 2020 range trend assessment). The 2002 Mustang/Dutch John wildfire burned more than 22,000 acres within the unit and remains an important ecological feature.

The primary highway corridor is US-191, which runs north from Vernal through Dutch John to the Utah-Wyoming state line; this road provides the main approach from the south. SR-44 connects Manila (southwest of the unit) eastward toward the unit's western margin. The Browns Park area on the unit's eastern flank is accessed via SR-318 from Colorado. BLM and Ashley National Forest two-track and maintained dirt roads provide interior access across the plateau; the unit is described in UDWR and hunter-community sources as having good public access with roads throughout. Bear Top Mountain is noted as an area that restricts motorized vehicle access. The unit is roughly 89–95% public land (BLM and USFS combined), with private land concentrated on lower winter ranges and in the Browns Park/Green River valley. Private land blocks require written permission; no CWMUs are specifically flagged for the Three Corners subunit in UDWR documents, though CWMU polygons appear on commercial hunting maps. Some road access into the eastern portion of the unit comes from Wyoming or Colorado, and GPS navigation is recommended near state lines. The Ashley National Forest Flaming Gorge area provides additional infrastructure (visitor center at Dutch John, campgrounds) south of the unit.

Lower elevations (5,400–6,500 ft) support Wyoming big sagebrush and mountain big sagebrush with perennial bunchgrasses and native forbs; this sagebrush steppe grades into desert shrub in the Browns Park area along the Green River, where riparian corridors provide cottonwood and willow cover. Mid-elevation benches carry pinyon-juniper woodland with mountain mahogany, bitterbrush, curleaf mahogany, and serviceberry (the mountain brush complex that is a primary browse community). The reseeded Mustang/Dutch John burn area supports increased perennial forbs and grasses. Upper reaches approach ponderosa and lodgepole pine. Cheatgrass (Bromus tectorum) encroachment is documented as an ongoing concern in sagebrush sites, placing sites at increased risk for fire. Key browse species per UDWR range-trend studies are Wyoming big sagebrush, mountain big sagebrush, and mountain mahogany.

Elk are the primary managed big game species; the Three Corners subunit carries an objective of 700 wintering animals (current modeled estimate ~650 as of 2023 plan) and is managed under a limited-entry strategy targeting a harvest average age of 5.5–6 years for bulls, indicating a mature trophy focus. The Three Corners subunit provides a higher percentage of year-round habitat than the other North Slope subunits, and also experiences significant depredation on private land year-round. Mule deer are present across the broader North Slope unit on general-season hunts. Rocky Mountain pronghorn antelope inhabit the sagebrush flats and plateau, managed as a combined Three Corners/West Daggett limited-entry hunt boundary. Rocky Mountain bighorn sheep occupy canyon and cliff habitat; a once-in-a-lifetime hunt (RS6708) is specific to Three Corners. Shiras moose are present and managed as a once-in-a-lifetime hunt (Three Corners/West Daggett combined, MB6007). Black bear and mountain lion are present as predators per statewide distribution. Chronic wasting disease (CWD) has been documented on the North Slope unit in deer; mandatory testing applies to certain hunts. The Mustang wildfire area draws elk from adjacent units. Some elk move seasonally into Wyoming where management authority transfers to Wyoming Game and Fish.

1. The Three Corners subunit is one of three subunits within the larger North Slope Elk Herd Unit #8 (also includes Summit/8a and West Daggett/8b); pronghorn (PB50xx), moose (MB6007), and bighorn sheep RS6709 use combined or adjacent boundaries — only RS6708 is Three Corners-specific. 2. Elk EB3091 is confirmed as the muzzleloader hunt (Sept. 21–Oct. 2) per the 2026 Application Guidebook; it does not appear in the general/any legal weapon season. 3. Elk EB3210 (Sept. 16–Sept. 20 archery) appears in the 2026 guidebook but was absent from the 2024 harvest report; quota unknown. 4. Mule deer general season data covers the full North Slope unit boundary, not the Three Corners subunit exclusively. 5. CWD has been documented on the North Slope unit; mandatory testing applies to certain hunts. 6. Public land pct of 89% sourced from GoHunt antelope profile for the combined boundary; UDWR elk plan shows Forest Service at 85% of yearlong range with BLM and state lands adding additional acreage — GoHunt elk profile lists 95%. 89% is the more conservative sourced figure. 7. Black bear and mountain lion are included as species given statewide documented presence but no subunit-specific hunt data was found.