Unit 157

Sand Mesa and Pilot Butte dominate the eastern skyline and serve as excellent orientation points. Ocean Lake and Lake Cameahwait are significant water features useful for navigation and hunting. The Sand Hills provide glassing vantage points across the central basin.

Boysen Reservoir itself is the primary reference feature—easily visible and navigable. Cottonwood Creek and the Little Wind River offer natural travel corridors. Numerous named draws—Riverton, Madden, Shriner, Mexican—provide structure to the open country.

Gerton Spring and Finley Spring mark reliable water sources away from the canal system.

Terrain stays consistently in the lower elevation band—all sagebrush and grassland country with scattered stands of juniper and cottonwood. There's no significant alpine terrain or dense forest. The landscape reads as classic high desert: low benches, sagebrush flats, and shallow draws separated by low ridges and buttes like Sand Mesa, Pilot Butte, and the Sand Hills.

Vegetation is sparse overall, with pockets of riparian growth along perennial drainages and heavier cover in canyon bottoms. Cottonwood groves cluster near reliable water sources, especially along Cottonwood Creek and around the reservoir margins.

The unit benefits from fair road connectivity with 787 miles of roads, though exact density is unclear due to data gaps. Highway 20-26 and Wyoming 789 provide primary vehicle access; Highway 135 borders the south. These highways funnel most hunters into predictable entry points.

Secondary roads branch into project lands and access major drainages. The relatively simple terrain and good road network mean pressure can be moderate during rifle seasons. However, the vast sagebrush flats and multiple draws offer plenty of dispersal opportunity.

Access is easiest near the highways and reservoirs; more remote country lies in the southern and eastern basins.

Unit 157 encompasses the Bureau of Reclamation's Riverton and Boysen project lands, including portions of Boysen State Park south of Highway 20-26. The unit wraps around the eastern and southern margins of Boysen Reservoir, bounded by the Wind River Reservation to the west and Highway 135 and 789 to the south. Riverton anchors the western portion; the unit extends east and south into lower desert basins and benchland. The terrain is vast but straightforward, with elevations holding between 4,700 and 5,900 feet across relatively open country interrupted by low buttes and draws.

Water is the unit's defining feature thanks to extensive Bureau of Reclamation infrastructure. Multiple canals (Wyoming Central, Pilot, Riverton Number 2) and lateral drains crisscross the project lands, making water reliable and relatively abundant. Boysen Reservoir dominates the western portion.

Perennial creeks including Cottonwood Creek, Haymaker Creek, and the Little Wind River provide consistent flow. Ocean Lake and several smaller reservoirs (Middle Cottonwood, Upper Cottonwood, Pilot Butte) dot the unit. Seasonal drains and sloughs (Rush Slough, Ice Slough) offer additional water during runoff.

Whitetails gravitate toward riparian zones; mule deer use canyon drainages and bench-top seeps.

Mule deer are the primary draw, utilizing sagebrush benches, canyon draws, and brush-choked drainages throughout the unit. Early season finds them on high benches; they migrate to deeper draws and river bottoms as pressure increases and temperature rises. Whitetails concentrate along Cottonwood Creek, the Little Wind River, and riparian cover near Boysen Reservoir and the larger lakes.

Glass from butte tops and high benches during early hours, then work draws and drainage bottoms as the day heats. The canal system and scattered trees provide movement corridors—use them to cut off deer transitions. Late season focuses on remaining water sources and heavier cover near the reservoir and major creeks.

Pressure rarely becomes extreme given the unit's size and accessibility.