Unit 301

Horse Prairie and Grasshopper Valley anchor navigation and provide the most recognizable terrain features for orientation. Key summits—Bloody Dick Peak, Black Mountain, and Selway Mountain—serve as visual landmarks visible across the rolling terrain. Big Hole Divide and Henneberry Ridge form major ridgelines that bound major drainages.

The Badger Ridge system provides high ground for initial glassing. Named creeks including Trapper Creek, Lodgepole Creek, and Kelly Creek are critical navigation aids, particularly the larger watercourses that hold reliable flow. Road Agents Rock and Pipe Organ Rock offer local reference points where County roads pass through notable terrain.

Terrain spans from roughly 5,200 feet in lower valleys to nearly 10,000 feet on high ridges, creating distinct habitat zones across moderate forest cover. Lower elevations feature sagebrush parks and open prairie valleys—Horse Prairie and Grasshopper Valley being the primary expanses—interspersed with scattered conifers. Mid-elevations transition into more consistent forest with patches of meadow and willow draws typical of moose country.

Upper slopes and ridges like Badger Ridge and Henneberry Ridge support denser conifer stands with alpine meadows. The moderate forest composition means open country for glassing alternates with timbered corridors where moose concentrate, particularly in willow-lined creek bottoms.

Nearly 930 miles of maintained roads network through and around the unit, creating good overall accessibility despite the vast size. Interstate 15 provides primary access corridor; County Roads branch east and south into key valleys. Big Sheep Creek County Road penetrates the western portion; roads access Bannack and Grant as staging points.

This road density supports fair hunting pressure, particularly on opening weekends, but the size allows hunters to find solitude by moving away from road-accessible corridors. Early-season pressure concentrates near easy access points; dedicated moose hunters willing to walk into higher elevation creek drainages find less competition. Limited private land interspersed throughout means understanding ownership boundaries is critical for access planning.

Unit 301 occupies the western portion of Beaverhead County, bounded by Interstate 15 on the north at Dell and following that corridor southeastward toward the Montana-Idaho border near Monida. The eastern boundary traces the state line westward to Medicine Lodge Pass, then follows the Pine Creek-Little Sheep Creek Divide north before dropping into Four Eyes Canyon and Big Sheep Creek drainage back to I-15. This creates a large, roughly triangular territory encompassing the Horse Prairie and Grasshopper Valley systems. The unit's orientation roughly parallel to I-15 makes it accessible from multiple approach points, with historic settlements like Bannack and Grant providing geographic reference points within the area.

Despite 'limited' water designation, several perennial creeks support moose habitat: Trapper Creek, Lodgepole Creek, Kelly Creek, and Bear Creek are the most substantial. Big Sheep Creek and its various forks form a major drainage system accessible via County Road on the western side. Springs are scattered throughout—The Puddles, Albers Springs, Magpie Spring, and others—but seasonal flow varies significantly.

Mid-elevation willow draws collect snowmelt and provide reliable summer water, particularly around 7,000-8,000 feet. Lower prairie valleys depend on irrigation ditches (Prohosky, Pierce, Mansfield-Prohosky) that provide supplemental water but aren't reliable hunting season sources. Understanding which creeks and springs hold water late into fall is essential for locating moose.

Unit 301 is moose country, with elevation and habitat distribution strongly favoring the species. Early season hunting (September) targets bulls in rut on lower elevation benches and in willow parks around 6,500-7,500 feet where they respond to calling. Mid-season focus shifts to mid-elevation drainages where water and willow concentrations hold moose during early fall.

Late season (October-November) pushes hunters higher into timber where moose yard in response to snow and cold. Key strategy involves waterproofing creek bottoms and willow draws during post-rut period. Terrain complexity (6.3/10) allows straightforward travel, but success depends on finding active water sources and moving methodically through likely habitat rather than covering distance.

Glassing from high benches early morning and evening improves sighting odds across the rolling country.