SU SLEEPER UNITS Wyoming Wyoming Unit 15 Hunt Planner Draw Odds
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Unit 15

3-D satellite terrain of Unit 15, 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 15 covers the Bighorn Basin floor between Greybull, Basin, and Worland—flat-to-rolling sagebrush and agricultural country at modest elevations. Elevations range from about 3,800 feet on the Bighorn River to 5,500 feet on the surrounding benchlands. The terrain is classic Wyoming basin: big sagebrush flats, irrigated hay fields and beet fields along the Bighorn River, cottonwood-lined river bottoms, and eroded badland formations on the benches. This is pronghorn country first and foremost—the open sage flats support excellent antelope numbers. Mule deer use the breaks and river-bottom cover, and whitetail are increasingly present in the cottonwood corridors along the Bighorn and its tributaries. Land ownership is a mix of BLM, state trust, and private agricultural land. The BLM ground is generally accessible and provides ample pronghorn hunting territory. US-20 and US-16/20 provide the main access corridors, with county roads and two-track reaching the benchlands. Greybull, Basin, and Worland all have gas, groceries, and basic lodging. Cell service is decent along the highways. This is a windshield-and-glass pronghorn hunt—cover the sage flats from the road, identify a buck, plan a stalk using terrain features for concealment, and execute. The flat terrain makes long-range stalking a chess game of using every shallow draw and sagebrush clump for cover. Mule deer hunters should focus on the breaks and badland formations where the terrain provides more security cover. October weather is pleasant on the basin floor—the Bighorn Basin sits in the rain shadow of the surrounding mountains and gets less precipitation than almost anywhere in Wyoming. Area 15 on the Bighorn Basin floor is pronghorn country — nonresidents can typically draw antelope tags with 0-1 preference points, making it an excellent entry point for first-time Wyoming hunters. The area has zero wilderness designations and no grizzly bear concerns. Access is predominantly BLM and state trust land on the benchlands, with private agricultural land along the Bighorn River and its tributaries. The resident/nonresident allocation favors residents but the quota is generous enough that nonresidents draw regularly. The area is known for high antelope densities on the sage flats with good public access, plus an underappreciated whitetail deer opportunity in the cottonwood river bottoms. Mule deer in the benchland breaks are a secondary draw. The flat, open terrain makes this a spot-and-stalk proposition where optics and patience matter more than physical fitness.

Unit Stats

Hunting Season Temps (3-yr avg)

Sep
71°
46°
Oct
53°
32°
Nov
39°
22°
Dec
30°
15°
Jan
26°
11°
Feb
25°
9°

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
CarbonElkArchery19315347
CarbonElkRifle2374380
CarbonMule DeerRifle2186191
CarbonPronghornArchery97478
CarbonPronghornRifle138489
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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.
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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.
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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 15.

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.

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

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