Unit 127
Cottonwood
Low-elevation sagebrush and grassland near Thermopolis with creek drainages and moderate foot traffic.
Hunter's Brief
Unit 127 sits in the lower Bighorn River canyon country south of Thermopolis, a mix of semi-arid ridges and creek bottoms with sparse timber. The terrain is relatively straightforward—rolling sagebrush hills cut by productive drainages like Owl Creek and Grass Creek where deer concentrate. Road access is fair with roughly 150 miles of roads available, though elevation gain is modest throughout. Water can be limiting on the benches, making creek systems and seeps critical to hunting strategy. This isn't remote country, but the moderate complexity and predictable terrain favor methodical hunters who work the drainages and ridges systematically.
- 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
Owl Creek and Grass Creek are the primary drainage systems worth hunting, running north toward the Bighorn River and providing natural travel corridors with reliable water. Blue Mesa and Round Top offer modest elevation for orientation and glassing the surrounding ridges. Numerous named gulches—Rattlesnake, Chimney, Coal Draw—dissect the landscape and funnel game movement, making them logical places to intercept deer.
The Bighorn River itself marks the eastern boundary and serves as a geographic reference point. Springs including Harris Spring and Keg Spring are scattered through the country and worth locating for both hunting access and water supply.
Elevation & Habitat
Elevation throughout the unit hovers around 4,700 feet median, with lows near 4,200 feet in the river bottoms and highs just under 6,000 feet on the ridges. This entirely lower-elevation band means consistent, relatively mild terrain without dramatic alpine transitions. Vegetation is predominantly sagebrush and grassland with scattered juniper and cottonwood in the creek corridors.
The sparse forest coverage means open country for glassing, though brush is thick enough to provide cover for deer. This is classic mule deer and whitetail habitat—semi-arid rangeland where water sources and green browse become hunting anchors.
Access & Pressure
With roughly 150 miles of roads and fair connectivity, Unit 127 sees moderate hunting pressure, especially during opening weeks. The proximity to Thermopolis and relative ease of access mean this isn't a solitude destination. Most pressure concentrates near road corridors and creek access points.
The rolling terrain and multiple drainages allow dispersal away from the main travel routes—hunters willing to hike the ridges and upper gulches can find quieter country. Early morning and late season typically receive lighter pressure. Road density suggests most of the unit is within reasonable distance of vehicle access, though some ridgeline country requires foot travel.
Boundaries & Context
Unit 127 encompasses the country immediately south of Thermopolis, Wyoming, bounded by Wyoming Highway 120 on the northwest and the Bighorn River as its eastern edge. The unit encompasses roughly the drainages between Gooseberry Creek and Tie Down Gulch, with Thermopolis serving as the gateway town. The southern boundary follows divides between major creek systems, creating a defined but relatively accessible hunting area.
Geography here is transition country—the edge of the Bighorn Basin meeting foothills, with multiple named draws and gulches providing structure to what otherwise reads as rolling rangeland.
Water & Drainages
Water is limited on the benches but concentrated in the creek systems. Owl Creek and Grass Creek flow reliably and attract deer, especially during hot periods or late season when surface water becomes scarce. Cottonwood Creek drains the western portion.
Multiple springs are marked on maps—The Maytag Spring, Harris Spring, Keg Spring—but their reliability varies seasonally. Irrigation ditches like the South Side Ditch and Dempsey Canal exist but shouldn't be counted on for hunting access. The Bighorn River itself is a perennial water source but runs through a narrow canyon that limits hunting opportunity along its banks.
Hunting Strategy
Unit 127 holds mule deer and whitetail deer. Mule deer favor the open sagebrush ridges and can be glassed from high points like Blue Mesa, especially during morning and evening hours. Whitetails concentrate in the creek drainages where cottonwoods and brush provide cover.
Early season strategy should focus on water sources and green feed in the drainages; hunt creek bottoms at dawn and late afternoon. Mid-season, work the ridges and saddles where deer transition between feeding and bedding areas. Late season pushes deer toward remaining water—focus on springs and creek systems.
The modest elevation gain means no dramatic seasonal migration, but October cooling often triggers increased movement across the ridges.