Unit 60-2

The Island Park Caldera and Henrys Fork Caldera define the geologic character and aid navigation on topographic maps. Key summits include Targhee Peak, Moonshine Mountain, and Osborne Butte, useful for orientation and high-elevation glassing. The Mesa Falls (Upper and Lower) and Sheep Falls mark the main Henrys Fork, a major drainage for travel and water.

Green Canyon Pass and Monida Pass provide northern access corridors. The extensive meadow network—particularly Antelope Flat, Big Grassy, and Henrys Lake Flat—creates visual breaks in the timber where glassing becomes productive.

Terrain ranges from roughly 5,000 feet in river bottoms to over 10,400 feet on ridge systems, creating distinct habitat zones. Dense forest dominates throughout—predominantly lodgepole and limber pine at upper elevations, transitioning to mixed conifer stands lower down. Sprawling meadow systems at intermediate elevations—Big Grassy, Antelope Flat, Camas Meadows, Stamp Meadows—provide open feeding areas.

The volcanic geology underlying much of the unit creates pockets of unique terrain, including the Island Park and Henrys Fork calderas. Lower canyon bottoms support cottonwood and riparian growth alongside willows and aspen.

Unit 60-2 is well-connected with nearly 2,600 miles of roads, though exact density is unavailable due to incomplete boundary data. U.S. 191-20 provides primary highway access; multiple canyon roads penetrate the interior including routes to Green Canyon, Trail Canyon, and adjacent drainages. Towns like Island Park, Saint Anthony, Ashton, and Last Chance support base operations.

The road network suggests moderate hunting pressure with accessible pockets throughout, though vast stretches of dense timber provide escape terrain. Early season sees heaviest use; winter access becomes limited at higher elevations.

Unit 60-2 encompasses the upper Henrys Fork drainage and adjacent mountain country straddling Fremont and Clark counties, beginning near Ashton and extending north along U.S. 191-20 to Shotgun Valley Road. The Moose Creek Plateau forms the core, flanked by the Eastern Centennial Mountains to the west and the Henrys Lake Mountains forming a secondary ridge system. Island Park and its surrounding flats anchor the northern boundary, while numerous canyons—Green, Trail, Hale, and others—dissect the unit into distinct drainages.

The landscape sits at the transition between the Snake River plain and the high mountain country of the Greater Yellowstone Ecosystem.

The Henrys Fork anchors the unit's hydrology, flowing north through the meadow country with consistent year-round flow. Tygee Creek and Rock Creek basins offer secondary drainage systems with reliable springs including Otter Springs, Fish Creek Spring, and Owens Spring. Multiple small reservoirs—Ashton, Mikesell, Davis lakes, Blue Creek Reservoir—and a string of mountain lakes provide water storage.

Numerous creeks—Spruce, Mule Meadows, Salamander, and others—drain the forested slopes. Water availability is moderate to good throughout, though high-elevation areas may rely on snowmelt early season.

White-tailed deer are the primary quarry, utilizing the forested slopes and canyon bottoms throughout the unit. Early season hunting focuses on high-elevation timber and transition zones where deer feed on forest vegetation and meadow edges during morning and evening. Rut activity concentrates around the ridge systems and canyon heads where doe concentrations move through escape cover.

Late season pushes deer to lower elevations and riparian areas; canyon bottoms become key holding areas. The dense forest requires close-range hunting and good glassing of meadows and parks. Water sources—creeks and small ponds—concentrate deer movement patterns in dry periods.