Unit 42
Remote high-desert basins and canyon country along Idaho's southwestern border with sparse timber and limited water.
Hunter's Brief
Unit 42 is expansive sagebrush and grassland terrain broken by deep canyons and scattered juniper, anchored by the Owyhee River drainage system. Most of the unit sits in the 5,000-6,500-foot band with relatively open country—long sight distances but sparse tree cover. Road access exists but is scattered; most hunting requires willingness to work away from vehicle traffic. Water is limited to springs, creeks, and reservoirs that merit careful planning. This is straightforward terrain in terms of navigation but demands self-sufficiency and map work.
- 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
Key navigation landmarks include the Monuments and Dry Forty in the north, which provide distinct glassing vantage points. Battle Creek and its associated lakes and crossings form a major drainage corridor useful for orientation and water access. Tent Creek Reservoir and the cluster of basins (Dutch Oven, Walcot, Spring Creek, Bullhead, Red, Kimbal, Antelope) structure the country—hunters can reference these basins to locate themselves in the vast open terrain.
The Sheep Hills and Pole Creek Breaks in the east offer elevated vantage points. Star Ranch Table, Lookout Butte, and Black Table provide summits for glassing distant terrain.
Elevation & Habitat
Terrain sits solidly in the lower-to-mid elevation band, primarily between 5,000 and 6,500 feet. Habitat shifts from open sagebrush and grassland flats in the basins to juniper-dotted ridges and draws. Scattered ponderosa or Douglas-fir patches occur on north-facing slopes and canyon bottoms, but overall forest cover is sparse—this is predominantly open country.
Vegetation transitions follow water availability and aspect; south-facing slopes remain sage-covered while canyon drainages hold denser riparian vegetation and scattered conifers. The Y P Desert and various flats (Antelope, Halogeton, Rentile) define much of the lower terrain.
Access & Pressure
The unit has roughly 1,180 miles of roads, but they're scattered across enormous country, resulting in fair accessibility rather than dense development. Roads tend to follow drainages and basin perimeters rather than penetrating the heart of the unit. The Ellis-May-Howe Highway provides western boundary access; most hunters stage from small settlements and work into the basins via two-track or jeep trails.
Pressure is generally light due to remoteness and limited services, but popular water points and accessible basins can see seasonal use. The vast open terrain means hunters can work away from roads quickly and find solitude, though it also means covering ground.
Boundaries & Context
Unit 42 occupies southwestern Owyhee County, bounded by the Salmon River to the north, the Idaho-Oregon state line to the south, and the Idaho-Nevada line to the east. The western boundary follows the Ellis-May-Howe Highway corridor. This is remote, sparsely populated country—the closest towns are small settlements like Dickshooter and Fairylawn, which serve as reference points rather than services hubs.
The unit encompasses roughly 1,400-1,500 square miles of transition zone between high desert and lower mountain terrain, with elevation spanning roughly 4,200 to 6,800 feet across varied basins and ridge systems.
Water & Drainages
Water is limited and scattered, requiring advance scouting. Reliable sources include Battle Creek and Tent Creek drainages, which flow through the unit and support most perennial water. The Little Owyhee River and Salmon River form boundary drainages but aren't always accessible within the unit.
Numerous springs (Dukes V, Rock, Summit, Mahogany, Dutcher, Antelope, Rattlesnake, Tub, Trout) are scattered across the basins but may be seasonal or difficult to verify from a distance. Multiple reservoirs dot the landscape—Juniper Basin, Bull Lake, Long Pull, Tent Creek, and others—but are often small and may hold water irregularly. Water planning is essential.
Hunting Strategy
Unit 42 historically holds white-tailed deer, which thrive in the sagebrush-juniper transition and canyon bottoms. Early season hunters should focus on basin perimeters where sage meets scattered conifers and water sources. Rut-phase hunting works the draws and drainages where deer concentrate—Tent Creek, Battle Creek, and the network of basins funnel movement.
Late season pushes deer to lower elevations and water-reliable areas like the river drainages and persistent springs. The open terrain favors glassing and stalking over driving; long sight distances reward binocular work. Success requires understanding local water patterns and being willing to pack into areas away from developed roads.
Navigation by terrain feature (basin names, ridges) is critical given the scale.