Unit 101

Key landmarks for navigation include the obvious terrain breaks: Castle Rock, Monument Butte, and The Spur stand out as prominent summits for glassing reference. The New Fork River and Green River corridors provide navigational certainty, though pronghorn work the open country between them. Blue Rim and McCullen Bluff form the basin's visual boundaries.

Several named canyons—Figure Four, Chapel, and Twelvemile—offer staging areas and water access. Sublettes Flat to the north and the scattered reservoirs (Jonah, Wild Horse, Vital) serve as logical focal points, though pronghorn distribution spreads across the open expanse.

The unit occupies a narrow elevation band between roughly 6,200 and 7,500 feet—all within the high-desert zone. Terrain consists primarily of open sagebrush flats and grass, with sparse scattered timber along drainages and ridgetops. The flatness of the topography creates long sight-lines ideal for spotting pronghorn, though scattered buttes and ridges provide visual anchors.

The landscape is predominantly treeless or lightly timbered, reflecting the arid conditions and high elevation. Summer greenup concentrates in the bottoms and north-facing slopes, while winter range spreads across the more exposed, wind-scoured flats.

Roughly 230 miles of roads network the unit, but most are secondary ranch and oil-field access routes rather than maintained highways. This sparse density means much of the unit remains undeveloped, yet roads concentrate near the river bottoms and reservoir areas, creating predictable pressure zones. The New Fork area sees the most casual use.

Large stretches of open country between roads remain quiet. Limited access paradoxically creates opportunity—distance from pavement discourages day-hunters, and the straightforward terrain allows savvy hunters to move quietly cross-country without being funneled onto main routes.

Unit 101 occupies a broad basin in western Wyoming, bounded by the Green River on the west and the New Fork River system on the east. Wyoming Highway 28 forms the southern edge, Highway 351 runs along the northern reaches, and U.S. Highway 191 clips the eastern boundary near Boulder Creek. The unit encompasses roughly 200 square miles of relatively flat to rolling high-desert terrain, with the New Fork town providing the nearest supply point.

This basin country sits between the high peaks to the east and the broader Green River valley to the west, making it a distinct geographic pocket within the state's pronghorn range.

Water availability is limited and concentrated. The Green River and New Fork River anchor the western and eastern boundaries respectively, but most of the basin between them is dry country dependent on developed sources. Juel Spring, North Sublette Meadow Spring, and several constructed reservoirs (Jonah, Wild Horse, Alkali Draw pits, Vital) provide localized water.

Alkali Creek and Granite Wash flow intermittently. Late-season hunting often revolves around these reliable water sources, as pronghorn must eventually water. Early-season animals disperse across the basins; pressure shifts toward water corridors as conditions dry through fall.

This is fundamentally a pronghorn unit with sparse forest cover that doesn't support other big game at huntable densities. Successful pronghorn hunting depends on glassing extensively from high vantage points—summits like Castle Rock and The Spur provide commanding views across miles of open country. Early-season animals respond to water concentration at developed reservoirs and spring areas; locate herds, plan approaches across open ground, and execute clean stalks.

Rut activity (late August through September) can bunch animals predictably. Midseason pressure shifts herds to more remote flats; expect longer glassing sessions and longer stalks. Water becomes critical leverage in late season as pronghorn concentrate on reliable sources.

The unit's flatness rewards patience and optics over bushwhacking.