Unit 20
Steep Clearwater Mountains terrain with river breaks and high ridges, challenging sheep country.
Hunter's Brief
This is demanding, high-elevation terrain spanning the Salmon and Selway River drainages in central Idaho. The country rises sharply from river canyons at 2,400 feet to alpine ridges near 9,000 feet, with moderate forest cover and limited water sources above the river systems. Road access is fair but roads don't penetrate deep—most hunting requires significant foot travel into complex terrain. Expect a physically demanding hunt in steep country with excellent glassing opportunities from high ridges.
- Compact: under 200 sq mi
- Moderate: 200 - 800 sq mi
- Vast: over 800 sq mi
- Few: under 25%
- Some: 25 - 60%
- Most: over 60%
- Limited: under 0.7 mi/mi² (backcountry)
- Fair: 0.7 - 1.5 mi/mi²
- Connected: over 1.5 mi/mi² (well-roaded)
- Flat: under 20% mountains
- Rolling: 20 - 55%
- Steep: over 55%
- Sparse: under 20%
- Moderate: 20 - 50%
- Dense: over 50%
- Limited: under 0.3% area
- Moderate: 0.3 - 2% area
- Abundant: over 2% area
Terrain Deep Dive
Landmarks & Navigation
Waugh Ridge and Waugh Mountain dominate the western side, offering major glassing vantage points overlooking the Salmon River. The Salmon River Breaks provide dramatic terrain reference, while the ridge systems including Smith Ridge, Roan Ridge, and Eakin Ridge form navigation corridors across the high country. Rattlesnake Lake and Hamilton Lakes serve as alpine water sources and camping reference points.
Devils Washbasin offers notable terrain breaks. Square Top and Mist Peak provide reliable visual landmarks for orientation in the high country. The river bars—Bargamin Bar, Lantz Bar, Yellow Pine Bar—mark access points along the main water drainages.
Elevation & Habitat
Terrain spans from deep river canyons just above 2,400 feet to high mountain slopes approaching 9,000 feet, with most country concentrated in the medium-elevation band. Vegetation transitions from riparian cottonwoods in river bottoms through moderate forest cover on mid-elevation slopes to alpine and subalpine habitat on the high ridges and peaks. The Clearwater Mountains support scattered to moderate timber, with open parks and meadows becoming more common at higher elevations.
Sheep habitat is concentrated on the steepest terrain—cliff-lined canyon walls, broken ridge systems, and high alpine areas above tree line where escape terrain and visibility prevail.
Access & Pressure
Fair road access via Forest Service roads provides entry points, but road density is moderate and roads don't reach hunting areas—they're staging points only. Falls Point Road and Elk Mountain-Montana Road are primary access corridors on the eastern side. Most hunting requires 4-8 miles minimum of foot travel from road ends to productive country.
The steep, complex terrain limits casual hunting pressure; the physical demands filter out many hunters. The river drainages see occasional boat-based access, but most serious hunting happens on high ridges reachable only by pack or foot from road ends.
Boundaries & Context
Unit 20 occupies rugged backcountry in Idaho County, bounded by the South Fork Salmon River and Selway River drainages on the west, with the Clearwater Mountains forming the core of the unit. The eastern boundary follows Forest Service roads and watershed divides over Bilk Mountain and Elk Mountain toward Montana. This is river-canyon country meeting high mountain ridges—a complex geography defined by significant elevation change and remote terrain.
The unit sits in the heart of central Idaho's wild country, where river breaks give way to steep, forested slopes climbing to alpine ridges.
Water & Drainages
The Salmon and Selway Rivers are the primary water corridors—cold, flowing year-round but steep-walled and difficult to navigate in places. High-elevation sources are limited: Rattlesnake Spring, Granite Spring, and Sheep Spring provide alpine water, though seasonal reliability varies. Lakes exist in the high country including Rattlesnake Lake, Hamilton Lakes, and the Trilby Lake system, but most require significant elevation gain to access.
Creeks (Myers, Slide, Salt, Porcupine, Rainey) cut through drainages but flow intermittently depending on season. Water scarcity above the main rivers means planning water carries for high-country hunting.
Hunting Strategy
This is bighorn sheep country, with terrain that defines the hunt. Sheep use cliff bands and broken ridge systems for escape, congregating on high alpine areas where visibility allows them to detect predators at distance. Early season hunting targets sheep on high ridges before snow pushes them toward lower elevations and river breaks.
Mid to late season sheep move to lower cliffs along canyon walls and river breaks, particularly along the Salmon River Breaks. Successful hunting requires excellent optics for glassing from distance—scan ridge systems, cliff bands, and alpine meadows from established vantage points like Waugh Ridge and high saddles. This is a physically demanding hunt in steep, complex terrain; terrain complexity of 8.5 suggests expect navigation challenges and significant elevation gain.
Pack a rifle, glass methodically, and be prepared for multi-day hunts away from road access.