Unit 102
Aspen Mountain
High desert basins and ridges between I-80 and Flaming Gorge Reservoir with scattered timber and multiple drainages.
Hunter's Brief
Unit 102 is big country spanning the arid plateau between Rock Springs and Flaming Gorge, with sagebrush-dominated flats and basins interrupted by rocky ridges and scattered conifer stands. The Red Creek Badlands and Tepee Mountains provide natural relief across mostly open terrain. Road access is fair but spread thin across the vast landscape, making pre-planning essential. Water is limited to creeks and springs concentrated in drainages; summer and fall hunting requires knowledge of reliable sources. Elevation ranges from moderate valleys to mid-elevation ridges, offering classic mule deer country with some whitetail habitat in riparian corridors.
- Compact: under 200 sq mi
- Moderate: 200 - 800 sq mi
- Vast: over 800 sq mi
- Few: under 25%
- Some: 25 - 60%
- Most: over 60%
- Limited: under 0.7 mi/mi² (backcountry)
- Fair: 0.7 - 1.5 mi/mi²
- Connected: over 1.5 mi/mi² (well-roaded)
- Flat: under 20% mountains
- Rolling: 20 - 55%
- Steep: over 55%
- Sparse: under 20%
- Moderate: 20 - 50%
- Dense: over 50%
- Limited: under 0.3% area
- Moderate: 0.3 - 2% area
- Abundant: over 2% area
Terrain Deep Dive
Landmarks & Navigation
The Red Creek Badlands dominate the central landscape, offering natural relief and glassing vantage points across broad basins. The Tepee Mountains to the south provide a major terrain anchor and viewing platform. Castle Rock, Tollgate Rock, and the Chimney Rocks (North and South) serve as distinctive navigation markers visible across the open country.
Sheep Mountain and Ramsey Peak offer higher-elevation reference points. The numerous named basins—Buckskin, Horseshoe, Wildhorse, and Sugarloaf—create natural compartments for breaking up the vast unit into manageable hunting areas.
Elevation & Habitat
The terrain transitions from sagebrush-covered basins like Buckskin, Horseshoe, and Wildhorse at lower elevations to more rugged ridgeline country at higher elevations. Scattered stands of juniper and ponderosa dot the ridges and upper basin country, but this is predominantly open, sparsely-forested range. The Red Creek Badlands and the Tepee Mountains provide the most dramatic relief, with rocky summits and cliff formations breaking up the otherwise rolling plateau.
Most hunting occurs across sagebrush flats and basin bottoms, where deer concentrate in available cover and along seasonal movement corridors.
Access & Pressure
Over 600 miles of roads cross the unit, but they're distributed thinly across vast open terrain, giving a deceptive sense of accessibility. Most roads are unimproved or seasonal tracks, requiring high-clearance vehicles. Primary access comes from Rock Springs to the east and Green River to the northwest.
The fair accessibility badge reflects the reality that reaching quality hunting country often means leaving roads behind and glassing from distance or hiking into basins and ridges. The size and sparse road density mean pressure concentrates along main roads and near obvious access points; hunters willing to hike away from vehicles encounter considerably less competition.
Boundaries & Context
Unit 102 occupies the high-desert transition country between Interstate 80 on the north and the Wyoming-Colorado border on the south, bracketed by the Green River to the west and Rock Springs/Highway 430 to the east. The Flaming Gorge Reservoir forms the western boundary, anchoring the unit's geography. This vast expanse spans roughly 40 miles north-south and covers diverse basin-and-ridge topography typical of Wyoming's high desert plateau.
The unit sits primarily between 6,000 and 9,500 feet elevation, straddling the boundary between lower desert grasslands and scattered montane forest.
Water & Drainages
Water is the limiting factor across this high-desert unit. Currant Creek and its Middle Fork provide the most reliable perennial flow, draining the north-central ridges. Spring Creek, Sage Creek, and West Spring Creek offer secondary drainages with seasonal or sporadic water.
Named springs scattered throughout—Parea, Castello, Pio, Deer, Davis, and others—are critical waypoints for hunting deep into the unit during dry months. The Green River forms the western boundary but requires significant travel to access. Jarvies Marsh Creek and Washam Wash provide additional drainage systems but may be unreliable late season.
Hunting Strategy
Unit 102 supports mule deer and whitetail populations adapted to high-desert basin country. Mule deer dominate the open sagebrush basins and ridges, using scattered timber and rim country for escape terrain. Early season hunting works the basin floors and lower ridges where deer disperse across sagebrush.
By rut season, bucks retreat to rougher terrain—the badlands, canyon systems, and higher ridgelines. Whitetails concentrate in riparian corridors along Currant Creek, Spring Creek, and the Green River bottoms. Glassing from ridgetops and basin rims is productive in this open country; hunters should identify water sources early and hunt drying basins in late season.
The complexity and distance from civilization reward patience and self-sufficiency.