Unit 118

Shamrock Hills

High-desert basin country with scattered rims and draws, moderate elevation plateaus across south-central Wyoming.

Hunter's Brief

Unit 118 is expansive high-desert terrain centered around the Rawlins area, characterized by open sagebrush flats broken by low rims and scattered draws. Elevations hover in the 6,500-8,000-foot range across mostly treeless country. Access is limited to a sparse road network, meaning most hunters cluster near highways and developed staging areas. Water exists but requires knowledge of springs and reservoirs to hunt effectively. The relatively straightforward topography makes navigation manageable, though distance and limited roads mean self-sufficiency matters.

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Terrain Complexity
3
3/10
?
Unit Area
1,095 mi²
Vast
?
Public Land
71%
Most
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Access
0.4 mi/mi²
Limited
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Topography
1% mountains
Flat
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Forest
Sparse
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Water
0% area
Limited

Terrain Deep Dive

Landmarks & Navigation

Lost Soldier Divide and Separation Rim run through the unit as key reference points, offering low vantage ground for surveying surrounding country. Coal Butte, Rawlins Peak, and Cherokee Peak provide recognizable summits for navigation and orientation. The Chain Lakes Rim and Coyote Springs Rim mark terrain breaks visible from distance.

Springs are distributed but scattered—Chicken Spring, Willow Spring, and Ninemile Springs anchor different sections of the unit. The major drainages (Lost Soldier Creek, Stewart Creek, and Spring Creek) flow through draws and valleys that break the otherwise flat terrain, serving as natural travel corridors and water sources.

Elevation & Habitat

The unit sits in a medium-elevation band between roughly 6,500 and 8,000 feet, creating a high-desert environment dominated by sagebrush flats and scattered grassy draws. Timber is sparse across the landscape—mostly absent from lower elevations and appearing only sporadically on the higher rims and ridges. The terrain transitions between open plains and low mountains without dramatic relief.

Vegetation reflects the semi-arid climate: shortgrass prairie in basins, some stands of juniper and low-elevation ponderosa on raised ground, and sagebrush across the vast middle elevations. The lack of dense forest creates open glassing country with long sight lines.

Elevation Range (ft)?
6,4738,061
02,0004,0006,0008,000
Median: 6,791 ft
Elevation Bands
6,500–8,000 ft
99%
5,000–6,500 ft
1%

Access & Pressure

The sparse road network (434 miles across vast acreage) concentrates access and pressure heavily along I-80, U.S. 287, and Wyoming Highway 73. Most hunters stage from Rawlins or camp near developed roads where vehicle access terminates. The limited access paradoxically helps hunters willing to walk: the terrain's openness means you can see far, but few roads mean most hunters stay near vehicle reach. The low terrain complexity means navigation is straightforward once off-road, reducing the mental burden of traveling deep into the unit.

Early season typically sees the heaviest pressure near accessible draws and water sources.

Boundaries & Context

Unit 118 occupies the high-desert country between Rawlins and Wamsutter in south-central Wyoming. Interstate 80 forms the southern boundary, with U.S. Highway 287 running north-south through the unit's eastern edge. The western boundary follows Sweetwater County roads from I-80 northward through Wamsutter, while Wyoming Highway 73 defines portions of the eastern limit.

The unit encompasses a vast expanse of relatively open country—the kind of big-sky terrain that defines Wyoming's interior basins. Rawlins serves as the primary supply and staging point for the region.

Land Cover Breakdown?
Mountains (open)
1%
Plains (open)
99%

Water & Drainages

Water is the limiting factor in Unit 118. Reliable water concentrates around named springs (Mud Springs, Bull Springs, Buck Spring) and scattered reservoirs (Mahoney, Sooner, Separation, and Rocky Draw). Several lakes exist—Chain Lakes, Monument Lake, and Hansen Lake—but their seasonal reliability varies. The creek system includes Lost Soldier, Stewart, and Spring Creek, though these run seasonally dependent on snowmelt and rainfall. Hunters must research current water conditions carefully; the unit's sparse water network means planning water sources directly affects hunting strategy and camp placement.

Hunting Strategy

Elk use this unit traditionally, moving between higher forested country to the north and the interior basins seasonally. Early season finds elk using draws and rims where scattered timber offers shade—focus on Lost Soldier Divide, Separation Rim, and the rim country around Coal Butte. As temperatures drop, elk transition toward lower elevations and the better thermal cover of scattered juniper patches.

The open terrain means glassing is crucial; identify water sources and camp in ways that allow you to glass from distance before committing to a stalk. Draws like Stratton, Willow, and Rocky serve as natural travel corridors—hunt the ridges above them and glass into them early and late. Water knowledge is essential; locate springs and reservoirs before season and plan water availability into your route.