Unit 47
High desert sagebrush basin with scattered buttes, limited water, and pronghorn country throughout.
Hunter's Brief
Unit 47 is classic Idaho high desert—sagebrush flats punctuated by rocky buttes and dry ridges spanning the Owyhee and Twin Falls county line. Elevations climb gradually from lower basins to modest plateaus, with sparse timber concentrated on higher benches. A network of rough roads provides access, though water is scarce and requires knowing where reliable springs and creek crossings exist. This is straightforward country—moderate terrain complexity makes navigation manageable, and the open landscape favors glassing and spotting from distance.
- 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
Salmon Butte and Player Butte serve as prominent reference points for orientation across the sagebrush. Castle Rock and Black Rock provide visual anchors when glassing from distance. Key drainages include Devil Creek (East and Middle Forks), Flat Creek, and Whiskey Slough—these canyons break the otherwise open country and concentrate water.
Numerous springs (Barbour, Big, Black Canyon, Pinkston, Box, Whiteside) dot the landscape; knowing their locations is critical for water strategy. Browns Bench and Goose Pasture offer higher-elevation vantage points for spotting and navigation.
Elevation & Habitat
Terrain sits in the 4,900- to 7,800-foot range, with most country concentrated in the medium-elevation sagebrush zone. Lower basins feature expansive sagebrush flats dotted with rabbitbrush and bitterbrush; higher ridges transition to scattered juniper and mountain mahogany. Sparse forest coverage means open sight lines dominate—large areas remain virtually treeless, broken only by occasional rocky outcrops and eroded buttes.
Vegetation reflects true high desert, adapted to limited moisture, with greasewood in the flatter sections and sagebrush steppe comprising the bulk of huntable terrain.
Access & Pressure
Approximately 285 miles of roads traverse the unit, creating fair accessibility relative to the landscape's size. Most roads are rough, two-track ranch and BLM tracks rather than maintained highways. Lower road density compared to northern Idaho units means fewer hunters overall, but concentrated access near Rogerson and the State 81 corridor can draw pressure.
The open terrain and glassing potential mean hunters can cover country efficiently; pressure disperses across large sagebrush expanses but concentrates near reliable water and around known buttes. Most of the unit sees moderate pressure, with less-known drainages offering refuge.
Boundaries & Context
Unit 47 straddles the Owyhee-Twin Falls county boundary in southwestern Idaho, anchored by Rogerson to the south and extending north toward the Twin Falls area. The western boundary follows the Idaho-Nevada state line, while eastern limits reach toward U.S. 93. Major highway corridors (U.S. 93, State 81, U.S. 30) frame the unit's perimeter, providing logical access points from towns like Twin Falls, Burley, and the remote Rogerson area. The unit encompasses roughly 2,000 square miles of classic Great Basin high desert terrain.
Water & Drainages
Water is the limiting factor in Unit 47. Poison Creek Reservoir and Salmon Falls Creek Reservoir are the most reliable sources, though access varies. Most hunting relies on scattered springs and seasonal creek flows; dry conditions mean springs like Barbour, Big, and Whiteside require verification before planning water-dependent camps. Three Mile Crossing and various creek fords provide drainage access points.
Early season and wet years may see better creek flows in Devil Creek and Flat Creek systems, but late summer reliability is questionable. Successful hunting often hinges on scouting water availability beforehand.
Hunting Strategy
Unit 47 is pronghorn country above all else. The open sagebrush flats and rolling basins provide ideal pronghorn habitat—wide sight lines suit their strengths and your glassing approach. Hunt from elevated benches and buttes to glass the surrounding country; spotting from Browns Bench or scanning from Castle Rock vantage points can cover miles of terrain.
Water becomes the anchor point; find where pronghorn water and stage toward the evening, typically at springs or creek crossings. Early season offers better vegetation concealment; late season demands longer-range glassing and more movement. The sparse forest allows minimal stalking cover, so patience and optics matter more than brush approach.
Scout reliable water sources in advance.