Unit 60A-1

Key navigation features include Split Rock—a distinctive landmark on the eastern side—and the several buttes useful for orientation: Castle Peak, Birdseye Butte, and Big Grassy Butte. The Centennial Mountains form the eastern horizon, broken by passes including Monida Pass and Lone Pine Pass, which serve as natural corridors and glassing vantage points. Island Park Reservoir dominates the northwestern section and provides both a water reference and camping access point.

The sagebrush flats offer fewer obvious markers; hunters should rely on ridge systems including Sheridan Ridge, Big Grassy Ridge, and Antelope Ridge for route-finding. Swan Lake and Bishop Lake offer secondary water references in the mid-unit area. Ground elevation changes gradually across much of the unit, making GPS navigation advisable despite the open terrain.

The unit spans from lower sagebrush basins around 4,700 feet to high plateaus and mountain slopes approaching 10,000 feet, creating distinct habitat zones. Lower elevations feature expansive sagebrush flats and grasslands—Camas Meadows, Antelope Flat, and Waters Flat dominate the visual landscape. Mid-elevation terrain transitions to juniper-dotted foothills and ridges, particularly within the North and South Junipers ranges.

Upper portions near the Centennial Mountains host scattered aspen, higher-elevation sagebrush, and rocky outcrops. The sparse forest coverage means open-country conditions prevail throughout most of the unit, with visibility for glassing excellent across the flats. Seasonal snow accumulates at higher elevations but lower basins often remain accessible through winter.

The connected road network totaling 2,747 miles of roads makes this unit relatively accessible despite its vast size. Rural highways including State Highway 33, Old Highway 91, and major county roads provide entry from Rexburg, Island Park, and Idaho Falls. No major interstate highways cross the unit interior, but Interstate 15 access points are nearby.

Most pressure concentrates on the western and southern sections near population centers and along Highway 33 corridor. The expansive sagebrush flats can absorb hunter distribution, but early-season activity peaks near water sources and accessible parking areas. High-elevation terrain near the Centennial Mountains sees less foot traffic.

The terrain's openness allows visual detection of other hunters across large distances, making solitude challenging during peak seasons but manageable by hunting interior basins away from main access corridors.

Unit 60A-1 encompasses portions of four central Idaho counties—Clark, Fremont, Jefferson, and Madison—bounded by Interstate 15 to the west and south, US-91 to the north near Spencer, and State Highway 33 to the north near Rexburg. The unit's eastern extent reaches toward the Centennial Mountains, while its western portion drops toward the Snake River Plain. Defined primarily by road access rather than natural features, the unit includes both high-elevation plateaus and lower agricultural valleys.

Rural communities including Island Park, Rexburg, and Idaho Falls sit near or adjacent to unit boundaries, providing staging points for hunters. The vast size and connected road system make this a accessible but complex unit requiring map study before entry.

Water is limited and scattered, requiring hunters to plan carefully. Major reservoirs—Island Park Reservoir, Hidden Lake Reservoir, Bishop Lake, and Swan Lake—provide reliable water but may be far from optimal hunting areas. Smaller drainages including Threemile Creek, West Camas Creek, and South Teton River flow through the unit but are often seasonal or slow in late summer.

Springs are scattered across the high basins: Sweat Springs, Horsemint Spring, Rock Spring, and Griffith Springs offer watering stops, though locations should be confirmed before planning routes. The extensive sagebrush flats have few dependable perennial sources, making early-season hunting near known springs or reservoirs advantageous. Late-season hunting requires knowledge of remaining reliable water; livestock use some springs and reservoirs, affecting access and water quality in developed areas.

Unit 60A-1 is pronghorn country. The expansive sagebrush flats, open ridges, and scattered juniper terrain provide classic pronghorn habitat across Camas Meadows, Antelope Flat, and the rolling plateaus between mountain ranges. Early season (August) finds animals dispersed across high basins and ridgelines where water and vegetation concentrate.

Mid-season (September) pushes pronghorn toward reliable water sources and lower-elevation benches as high-country conditions dry. Late season (October) keys on remaining water and movement between sagebrush areas as animals migrate between winter and fall ranges. Hunting tactics center on glassing from high points—Big Grassy Ridge, Sheridan Ridge, and buttes provide excellent vantage points—then stalking through open terrain where cover is minimal.

Success requires early starts, patience, and acceptance of long-range shooting opportunities across the open country. Water sources become critical waypoints; staging near lakes or springs increases encounter probability. The terrain's openness rewards hunters who move deliberately and glass thoroughly before committing to stalk.