Unit 51

High-country rolling terrain spanning Little Lost River drainages with sparse timber and challenging access logistics.

Hunter's Brief

Unit 51 covers rolling mountains with elevations from mid-4000s to over 12,000 feet, mixing open ridges and scattered timber across the Little Lost River watershed. Access is via a network of Forest Service roads, though the 1,466 miles of routes serve a vast landscape, creating real distances between water sources and camps. This is big-country elk habitat with significant elevation variation; early-season hunters work high basins while late-season requires dropping into lower drainages. Expect moderate pressure and reward for those willing to cover miles.

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Terrain Complexity
7
7/10
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Unit Area
945 mi²
Vast
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Public Land
92%
Most
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Access
1.6 mi/mi²
Connected
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Topography
43% mountains
Rolling
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Forest
16% cover
Sparse
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Water
0% area
Limited

Terrain Deep Dive

Landmarks & Navigation

Major peaks including Hawley Mountain, Foss Mountain, and Mount Breitenbrach provide navigation anchors and glassing points across rolling ridges. The Hawley Mountains and Red Hills define terrain structure in different sections of the unit. Copper Lake and Horse Lake offer water reference points, while Firebox Summit and Pass Creek Summit mark key terrain junctions.

Named canyons like Taylor, Hawley, and Hell Canyon channel drainages and provide natural travel corridors. These landmarks help orient hunters in complex rolling country where terrain repetition can obscure position.

Elevation & Habitat

Terrain spans from roughly 4,700 feet in lower drainages to over 12,000 feet on the highest ridges, creating distinct seasonal habitat zones. Lower valleys support sagebrush and grassland with scattered conifers, while mid-elevations transition to open rolling slopes with ponderosa and Douglas-fir. Upper basins and ridgelines break into alpine meadows and sparse high-country timber above 9,500 feet.

This elevation spread means hunters encounter dramatically different country depending on season and slope aspect—north-facing slopes stay forested and cool while southern exposures open into glassable terrain.

Elevation Range (ft)?
4,76012,159
02,0004,0006,0008,00010,00012,00014,000
Median: 6,919 ft
Elevation Bands
Above 9,500 ft
7%
8,000–9,500 ft
22%
6,500–8,000 ft
33%
5,000–6,500 ft
34%
Below 5,000 ft
5%

Access & Pressure

The 1,466 miles of road network creates logical staging areas near Howe and along Highway 33, but actual road density across the vast unit means significant distances between access points. Forest Service roads provide the primary entry, with Road 094 and Road 227 forming main spines into the unit. This extensive road system suggests moderate hunting pressure concentrated near primary trailheads and road-accessible drainages, leaving opportunity for hunters willing to hike deep into rolling terrain.

Early-season crowds typically concentrate on accessible high basins, creating potential for finding quiet country by committing to longer foot approaches.

Boundaries & Context

Unit 51 encompasses portions of Butte, Custer, and Lemhi counties in central Idaho, centered on the Little Lost River drainage system. The unit boundaries follow natural divides including the Lemhi Divide to the east, with State Highway 33 forming the northern boundary near Little Smoky Creek. Forest Service roads, particularly Road 094 and Road 227, define access corridors through this expansive terrain.

Geographic anchors include the towns of Howe and the historical settlements of Berenice and Clyde, though the unit itself is primarily roadless backcountry with limited developed infrastructure.

Land Cover Breakdown?
Mountains (forested)
13%
Mountains (open)
30%
Plains (forested)
4%
Plains (open)
54%

Water & Drainages

Long Lost Creek forms the primary drainage artery, with multiple forks including South Fork Deer Creek and Main Fork providing secondary water sources. Barney Creek, Hilts Creek, Jackson Creek, and Massacre Creek drain different sections, though water reliability varies seasonally. Scattered springs including Blind Springs, Willow Springs, Barney Hot Springs, and Coyote Spring supplement available water, but their reliability depends on season and snow melt patterns.

Several small reservoirs and lakes including Nolan Lake, Shadow Lakes, and Mill Creek Lake serve as reliable water markers. Given the limited water badge, hunters must plan water access carefully, particularly during September and early October.

Hunting Strategy

Unit 51 is primarily elk country across varied elevations. Early season (September) targets high basins and ridges where elk summer—glassing from peaks like Hawley Mountain or Foss Mountain covers miles of rolling terrain. The emphasis shifts to drainages and mid-elevation slopes during rut season as bulls move into timber corridors.

Late season typically requires dropping significantly in elevation to lower valley country and canyon bottoms where remaining elk concentrate. The rolling topography and sparse timber means successful hunting combines glassing skills with willingness to cover distance—expect to move frequently rather than sit static areas. Water management becomes critical in October and later, so proximity to reliable creeks or springs drives camp placement and daily hunting plans.