Unit 4

Cathedral Peak, Sublette Peak, and the Simpson Peaks serve as dominant glassing and navigation landmarks across the unit's open skyline. The Thorofare Plateau and Buffalo Plateau define major terrain blocks useful for orientation. Two Ocean Pass and Shoshone Pass are key saddles offering passage between basins and routing options for foot travel.

Named creeks—Sheffield, Blackrock, Whetstone—follow reliable drainages that sheep use and hunters rely on for navigation. Emerald Lake, Enos Lake, and scattered high-elevation lakes mark water sources worth locating before trips.

Nearly all terrain sits above 8,000 feet with the highest peaks reaching over 12,000 feet, creating a landscape of windswept ridges, alpine meadows, and moderate conifer cover. Vegetation transitions from limber pine and whitebark pine at higher elevations to Engelmann spruce-subalpine fir forests on mid-slope terrain. Open parks and meadows—Turpin, Fourmile, North Fork—break up the timber and provide critical glassing flats.

The rolling topography creates pockets of protected terrain between ridges, but much of the unit is exposed to weather and requires constant elevation changes.

Nearly 900 miles of maintained roads provide jumping-off points, but actual hunting pressure concentrates near trailheads and lower-elevation drainages. The terrain's complexity and high elevation limit casual access—most of the unit remains far from roads and requires backcountry fitness. Highway 287 provides highway access from Jackson and Dubois.

The Shoshone National Forest boundary to the south offers additional road systems. Fair accessibility means some hunters can reach this country, but the vast terrain and genuine difficulty keep numbers manageable outside popular pockets.

Unit 4 comprises the high country between Yellowstone National Park's south boundary and the Shoshone National Forest, bounded by Highway 287 to the west and the South Fork Shoshone River system to the east. The unit encompasses roughly 900 miles of maintained roads through a vast alpine landscape, though actual hunting access relies heavily on foot travel. The southern boundary follows the Thorofare River drainage, a remote corridor that defines the eastern edge of this complex terrain.

This is classic Greater Yellowstone high country—big, exposed, and unforgiving.

Water is genuinely limited and seasonal—springs like Big Springs, Bartrand Spring, and North Buffalo Fork Springs provide basins but aren't guaranteed year-round. The South Fork Shoshone River and Thorofare River are perennial but accessible only along their drainages. Most high-elevation terrain relies on snowmelt and scattered seeps; late-season hunts require identifying reliable springs beforehand.

Creeks dry to trickles by fall in many areas. Hunters must treat water scarcity as a primary logistical constraint affecting route planning and camp placement.

Unit 4 is dedicated bighorn sheep country with terrain perfectly suited to the species—steep ridges, escape cliffs, and high-elevation refuge. Success depends on glassing ability and understanding sheep movement patterns between summer alpine and fall transition ranges. Early season hunting focuses on high ridges and exposed peaks; sheep move lower and seek windswept areas as weather deteriorates.

The unit's size and complexity mean hunters must glass hard and be willing to relocate camps frequently. Water scarcity shapes routes—identify springs and seeps before the hunt. This unit rewards patience, optics, and acceptance of challenging weather at altitude.