Unit 51

Lemhi

High-elevation rolling country spanning three counties with scattered timber and challenging terrain complexity.

Hunter's Brief

Unit 51 stretches across rugged terrain in central Idaho's Butte, Custer, and Lemhi counties, dominated by rolling ridges and high basins between 5,000 and 12,000 feet. The landscape alternates between open sagebrush flats and sparse timber stands, with a solid network of Forest Service roads providing access throughout the unit despite its size and complexity. Water exists but requires knowledge of springs and creek drainages; reliable sources include Swauger Lakes, Horse Lake, and the creek systems draining the higher country. Expect a moderate hunting experience with room to find solitude away from the most accessible corridors.

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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

Tyler Peak, Bear Mountain, and Big Windy Peak serve as dominant high-country reference points for navigation and long-range glassing opportunities. The Hawley Mountains and Red Hills anchor the unit's ridgeline system, providing navigation corridors through more featureless terrain. Swauger Lakes and Horse Lake offer reliable water reference points and potential hunting focal areas; Copper Lake provides additional alpine-country orientation.

Named drainages like Long Lost Creek, Massacre Creek, Barney Creek, and Hawley Creek serve as travel corridors and natural funnels through the unit. Firebox Meadows and Pass Creek Summit provide open-country markers useful for route-finding in rolling sagebrush terrain.

Elevation & Habitat

The unit spans from around 4,700 feet in lower valleys to over 12,000 feet on high summits, creating distinct elevation zones within the rolling terrain. Lower elevations support sagebrush flats and scattered juniper, transitioning to mixed conifer stands on middle slopes, with high-elevation ridges often open or lightly timbered. Sparse forest coverage means much of the country remains visible and accessible without heavy brush or dense timber obstacles.

Basins like Birch and Wet Creek offer meadow country interspersed with timber patches, while ridgelines provide open glassing terrain. The rolling topography creates numerous benches and parks rather than sheer cliffs.

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

Extensive Forest Service road network provides connected access throughout the unit with 1,466 miles of total roads, though density metrics aren't specified. The road system is well-distributed enough to access multiple drainages and elevations, reducing the tendency for concentrated hunting pressure in any single corridor. However, the unit's vast size and rolling complexity mean that accessible and inaccessible country exists adjacent to each other—the sprawling terrain creates natural pressure relief if hunters move away from obvious staging areas near lower road access.

Main access points appear clustered near the unit boundaries; interior country beyond five miles from roads likely sees lighter hunting pressure.

Boundaries & Context

Unit 51 occupies a substantial block of central Idaho country, spanning portions of Butte, Custer, and Lemhi counties from the Little Lost River drainage east to the Lemhi Divide. The unit is bounded by Five Points Creek Road on the west and follows drainages and ridgelines through some of Idaho's most complex terrain. Geographic anchors include the small communities of Berenice, Howe, and Clyde on its periphery, with access points from Highway 33 and various Forest Service corridors.

The unit's expansive size and rolling topography create distinct hunting zones separated by significant elevation changes and drainage systems.

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

Water & Drainages

Water is scattered but present throughout the unit, requiring hunters to plan around known sources. Perennial creeks including Long Lost Creek, Massacre Creek, Barney Creek, and Hawley Creek drain the higher terrain and maintain flow through hunting seasons. Multiple springs dot the country—Willow Springs, Moffett Springs, Iron Springs, and Y Springs among them—though locating these requires local knowledge or detailed mapping.

Reservoirs and alpine lakes including Mill Creek Lake, Summit Reservoir, Shadow Lakes, and the Swauger Lakes complex offer reliable water in their respective drainages. Lower basins tend to have more reliable water; high ridge country requires careful planning and understanding of seasonal flow patterns.

Hunting Strategy

Unit 51's rolling terrain and sparse timber create a hunt requiring adaptation to complex topography without heavy forest navigation challenges. The elevation span supports multiple species across different zones—higher basins and ridgelines suitable for early and late-season hunting, lower country for mid-season pursuits. Glassing opportunities exist on open ridges and basin edges, particularly Tyler Peak and Bear Mountain areas where distance glassing is viable.

Water drainages like Hawley Creek and Barney Creek create natural travel corridors; plan camps near reliable water sources rather than attempting to work dry country. The unit's 7.7 complexity score reflects its scale and rolling terrain—success hinges on understanding drainage systems, timing elevation-based movements, and recognizing that the most obvious access roads rarely lead to the best hunting.