Unit 60-1X

Upper and Lower Mesa Falls provide geographic anchors and notable water features in the western drainages, while Targhee Peak and Moonshine Mountain offer high-country glassing platforms on the eastern ridges. The Moose Creek Plateau dominates the central-north terrain and is navigable by road and on foot. Multiple named gaps—including Monida Pass, Green Canyon Pass, and Reas Pass—serve as natural travel corridors and navigation references.

The Island Park Caldera defines the northern geologic framework, while the extensive lake and reservoir system (Hirschi Flat, Edwards Lake, Hancock Lake, and a dozen others) marks water sources and staging areas throughout the unit.

The unit spans from around 5,000 feet in lower valleys and basin floors to above 10,400 feet on the highest ridges, with most terrain between 6,500 and 8,500 feet. Dense forest dominates the ridge systems and higher slopes—primarily lodgepole and whitebark pine with subalpine fir—while extensive sagebrush-grass meadows break up the timbered country at mid-elevations. The Henrys Lake Flat and associated basin systems provide open terrain with scattered timber pockets, creating classic mule deer transition habitat.

Alpine meadows and tundra-like terrain appear above 9,500 feet on the highest summits, though they represent a small portion of the unit.

Extensive road network (nearly 2,600 miles total) provides connected access throughout the unit, with major routes following the basin floors and lower ridge passes. U.S. 191-20 serves as the primary southern access corridor, while internal roads reach into most major meadow systems and ridge country. The combination of connected roads and established towns nearby means moderate hunting pressure is likely, though the terrain complexity and size of the unit allow hunters to find less-crowded country by moving away from main road corridors.

Early season and late-season hunting typically see lighter pressure than rut period.

Unit 60-1X encompasses portions of Clark and Fremont counties in east-central Idaho, anchored around the Island Park area and bounded by U.S. 191-20 to the south near Ashton. The unit encompasses a moderate-to-vast expanse of high-country terrain that includes the Moose Creek Plateau in the north and extends south into the Henrys Lake Mountains and surrounding basin country. The Eastern Centennial Mountains form a significant spine through the region, creating natural drainage patterns and habitat zones.

This is island-park gateway country with established communities like Island Park, Saint Anthony, and Last Chance providing resupply access.

Multiple reservoirs and lakes make water relatively abundant across 60-1X, including Ashton Reservoir, Mikesell Reservoir, and several Davis Lakes in the lower sections, plus numerous high-alpine lakes above 8,000 feet. Spring Creek, Mule Meadows Creek, and Little Lake Creek provide perennial water in the drainage bottoms, while named springs—Trail Canyon Spring, Otter Springs, Fish Creek Spring—offer reliable sources in basin country. The Henrys Fork system forms a major drainage corridor on the west side, though it's less huntable due to canyon proximity.

Mid-elevation basin systems hold water well into late seasons, making them dependable for drop camps.

Mule deer in this unit use elevation migration patterns, starting high on the forested ridges and moving to lower meadow systems as fall progresses. Early season hunting focuses on glassing from ridge vantage points like Targhee Peak or Moonshine Mountain, looking for bucks in timber-to-meadow transition zones. Mid-elevation flats—Henrys Lake Flat, Camas Meadows, Big Grassy—hold deer during the rut, especially around water sources and in sagebrush cover at dawn and dusk.

Late season concentrates on basin systems where deer drop down and gather around reliable water like the Davis Lakes and Ashton Reservoir. The moderate terrain complexity and multiple habitat zones make flexibility and elevation drops critical as seasons progress.