3-D satellite terrain of Unit 103, served by Wayward — the free iPhone GPS app from the people behind Sleeper Units. Drag to turn, scroll or pinch to zoom. Get Wayward and the whole unit rides on your phone, offline.
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Area 103 covers the country in the central Bighorn Basin around Greybull and the lower Bighorn River corridor between the Greybull, Otto, and Emblem areas. Elevations run from about 3,800 feet on the river bottoms to 5,500 feet on the surrounding benches. The country is wide-open Bighorn Basin: big sagebrush and greasewood flats, eroded badlands of red and white clay, irrigated alfalfa and beet fields along the Bighorn and Greybull rivers, and the dramatic Sheep Mountain anticline that's been pushed up by underlying salt domes. Cottonwood ribbons run the river bottoms; the Greybull-Big Horn County Airport sits in the basin and the Museum of Flight has a collection of vintage aircraft worth a stop if you're early or weathered out. The country looks lifeless from the highway and isn't—the antelope are out there if you glass.
BLM and state hold significant chunks of the open country, with substantial private ag and ranch on the better-watered ground. The HMA and Walk-In programs add access. US-14/16/20 is the paved spine. Greybull is the supply town with gas, motels, and the kind of small Wyoming town diner that knows how to do biscuits and gravy. Cell service is fair on the highway. Antelope rifle in October is the bread-and-butter; the basin holds strong pronghorn density. Mule deer in the breaks and badland country; whitetail in the river bottoms. The wind off the Bighorns and the basin convergence is brutal—plan around it.
Unit Stats
Roadless
21.2%
1+ mile from any road
Hunting Season Temps (3-yr avg)
Sep
65°
41°
Oct
49°
28°
Nov
34°
16°
Dec
27°
12°
Jan
25°
11°
Feb
25°
10°
Recent Trophy Scores · 2020–2025
Trophy score data is tracked by county, so the overlap with GMU boundaries is approximate. These numbers tell you whether the area is capable of growing big animals — they do not indicate public vs. private land. Big elk can come from anywhere; most elk in the lower 48 trace back to Yellowstone stock that was transplanted west after the species was nearly extirpated in the early 1900s.
County
Species
Method
Count
Avg Score
Top Score
Lincoln
Elk
Archery
5
316
330
Lincoln
Mule Deer
Archery
1
185
185
Lincoln
Mule Deer
Rifle
1
181
181
Lincoln
Pronghorn
Archery
6
71
77
Lincoln
Pronghorn
Rifle
2
83
85
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Nearest Towns
Casper
Full services: gas, groceries (Walmart, Albertsons, Ridley's), lodging, hospital (Wyoming Medical Center). Largest central WY city.
Glenrock
Small town; gas, groceries, lodging. 20 mi E of Casper on I-25.
Thermopolis
Full services: gas, groceries, lodging, hot springs. Gateway to Owl Creek Mountains.
Shoshoni
Small town; gas, basic supplies. Junction of US-20 and US-26.
Lusk
Small town; gas, groceries, lodging. Eastern staging for units 18, 108-110.
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Campgrounds
Casper Mountain Campground
Natrona County Parks
Casper Mountain; 39 sites; 8,000 ft; popular local hunting base.
Grave Springs Campground
BLM
South of Casper; 5 sites; convenient BLM staging area.
Boysen State Park
WY State Parks
Near Shoshoni; multiple loops along Boysen Reservoir. Good base for central WY hunts.
Wind River Canyon Campground
Various
Between Shoshoni and Thermopolis; scenic canyon; limited sites.
Dispersed camping
BLM / USFS
Abundant BLM land in central Wyoming; also available on Casper Mountain and in the Bighorn foothills.
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Statewide Outfitters & Directories
These outfitters operate statewide or in multiple regions. Check each one's website to confirm they cover Unit 103.