SU SLEEPER UNITS Wyoming Wyoming Unit 103 Hunt Planner Draw Odds
| |
All Units |

Unit 103

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.

Edit
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.

CountySpeciesMethodCountAvg ScoreTop Score
LincolnElkArchery5316330
LincolnMule DeerArchery1185185
LincolnMule DeerRifle1181181
LincolnPronghornArchery67177
LincolnPronghornRifle28385
Edit

Nearest Towns

CasperFull services: gas, groceries (Walmart, Albertsons, Ridley's), lodging, hospital (Wyoming Medical Center). Largest central WY city.
GlenrockSmall town; gas, groceries, lodging. 20 mi E of Casper on I-25.
ThermopolisFull services: gas, groceries, lodging, hot springs. Gateway to Owl Creek Mountains.
ShoshoniSmall town; gas, basic supplies. Junction of US-20 and US-26.
LuskSmall town; gas, groceries, lodging. Eastern staging for units 18, 108-110.
Edit

Campgrounds

Casper Mountain CampgroundNatrona County ParksCasper Mountain; 39 sites; 8,000 ft; popular local hunting base.
Grave Springs CampgroundBLMSouth of Casper; 5 sites; convenient BLM staging area.
Boysen State ParkWY State ParksNear Shoshoni; multiple loops along Boysen Reservoir. Good base for central WY hunts.
Wind River Canyon CampgroundVariousBetween Shoshoni and Thermopolis; scenic canyon; limited sites.
Dispersed campingBLM / USFSAbundant BLM land in central Wyoming; also available on Casper Mountain and in the Bighorn foothills.
Edit

Statewide Outfitters & Directories

These outfitters operate statewide or in multiple regions. Check each one's website to confirm they cover Unit 103.

Pinedale, WY. Bridger Wilderness. Since 1976 (48 years). Elk, deer, bear, moose, antelope. 80% return/referral clients. Guide of the Year awards.
Douglas, WY. 300,000 acres, Area 7. License #BG 063. Trophy elk, deer, antelope, bear, birds. MBNF permitted.
Western WY. Pack-in wilderness + drive-in camps. 80% bull elk success (2024). Documented results 2009-2025. Elk, deer, sheep, moose, lion.
Cody, WY. East Yellowstone highway. Absaroka Range pack-in hunts. Elk, mule deer, bear. Guest ranch + outfitting.
Jackson Hole / Teton Wilderness. Thorofare and upper Yellowstone. 30+ years. Backcountry horseback elk hunts.
Cody, WY. North Fork Shoshone, near Yellowstone East Entrance. Guided elk and mule deer.
Sunlight Basin. Horseback wilderness hunts. Small group camps. Elk and mule deer. Cody area.
Star Valley / Wyoming Range. Units 90, 92, 94. Region G/H. Elk and mule deer. Verified live.

Are you a guide or outfitter in this unit? Add your listing

Edit

Outdoor & Gun Stores

Sportsman's WarehouseCasper, WYFull hunting/outdoor retailer; firearms, optics, ammo, clothing.
Murdoch's Ranch & HomeCasper, WYFarm & ranch store; ammo, hunting clothing, supplies.
WalmartCasper, WYAmmo, basic hunting supplies, camping gear, groceries.
NAPA / Ace HardwareVarious small townsBasic hunting supplies and ammo in smaller communities.
Edit

Game Processors

R&R Custom MeatsCasper, WYWild game processing; sausage, jerky, specialty cuts; (307) 234-3736
Prairie Rose ProcessingCasper, WYCustom wild game cuts and sausage; call ahead during season.
Glenrock LockerGlenrock, WYWild game processing; small-town shop; basic cuts and wrap.
Edit

Gas Stations

Multiple stationsCasper, WY — I-25; 24-hr fuel; full services.
MaverikGlenrock, WY — I-25; convenient for eastern Casper-area hunts.
SinclairShoshoni, WY — US-20/26 junction; fuel for central WY.
MaverikThermopolis, WY — US-20; last fuel before heading into Owl Creeks.
ConocoLusk, WY — US-18/20; eastern WY fuel stop.
Edit
Search all Wyoming hunts →

Data from sleeperunits.com. Always verify with the official Wyoming Game & Fish proclamation.

Suggest an edit