deer hunt area · Wyoming Game and Fish Department
Deer Hunt Area 21 Thunder Basin
Wyoming, United States
The map opens on this unit. Turn on Hunting units in Layers to see its boundary with public land, your pins and the forecast.
About Deer Hunt Area 21 Thunder Basin
Deer Hunt Area 21 Thunder Basin is a deer hunt area in Wyoming, United States, set by Wyoming Game and Fish Department. It covers about 2,206 km² (852 mi²). No town of the HuntGrid list lies inside it; the nearest is Gillette, about 0.4 km from its edge.
HuntGrid draws its boundary from Wyoming Game and Fish Department's data for the 2026 season. The agency uses this unit system for Mule deer and White-tailed deer.
- Unit code
- 21
- Area
- 2,206 km²
- Area (miles)
- 852 mi²
- Boundaries
- 2026
Public and protected land mapped inside it
HuntGrid's public land layers map about 405 km² of public or protected land inside it, 18% of the unit. Some protected land is privately owned (a conservation group's, for one). By manager, as the source names it:
| Manager | km² | Share |
|---|---|---|
| Unknown | 161 | 7% |
| Bureau of Land Management | 146 | 7% |
| Forest Service Region 02 Rocky Mountain | 92 | 4% |
| Unknown | 5.6 | under 1% |
| CITY OF GILLETTE | 1.0 | under 1% |
| Gillette, City of | 0.0 | under 1% |
Boundaries are approximate and aren't legal descriptions. Public land doesn't always mean you can hunt there: check your local regulations and posted signs.
Public land: U.S. Geological Survey (USGS) Gap Analysis Project (GAP), 2025, Protected Areas Database of the United States (PAD-US) 4.1
Seasons and regulations
Seasons for this unit that a person has checked against Wyoming Game and Fish Department's regulations:
| Species | Dates | Details |
|---|---|---|
| White-tailed deer | Oct 1, 2026 to Oct 31, 2026 | antlerless, draw source |
| White-tailed deer | Nov 1, 2026 to Nov 15, 2026 | source |
The official regulations have the final word: check them before you hunt.
Units around it
Next to it in the same unit system
- Deer Hunt Area 3 Keyhole
- Deer Hunt Area 8 Upton-Four Horse
- Deer Hunt Area 10 Rochelle Hills
- Deer Hunt Area 18 Campbell
- Deer Hunt Area 19 Pumpkin Buttes
- Deer Hunt Area 22 Douglas
Other hunting units that cover part of it
- Sharp-Tailed Grouse Hunt Area 1 (east of the Continental Divide)
- Sage-Grouse Hunt Area 4 (closed)
- Sandhill Crane Hunt Area 7
- Pheasant Hunt Area 11
- Mountain Lion Hunt Area 24 (Rochelle)
- Antelope Hunt Area 24 Thunder Basin
- Black Bear Hunt Area 35 ( management unit)
- Elk Hunt Area 123 Black Thunder
- Elk Hunt Area 129 Non-Herd Unit
- Nonresident Deer Region B
- Central Flyway Zone C2 (waterfowl zone)
- Nonresident Elk Region: Eastern
What HuntGrid shows for Deer Hunt Area 21 Thunder Basin
- Its boundary on the map; tap inside it for the unit's card with the agency's regulations link.
- Public land and the other hunting units in the same view, each with its source.
- Season dates once a person has checked them, and legal shooting hours where the rule is checked.
- Hourly wind with a scent cone for every stand, and official weather alerts.
- Offline maps: download the area and use the map, your pins and the forecast with no signal.
Questions
How big is Deer Hunt Area 21 Thunder Basin?
About 2,206 km² (852 mi²), as HuntGrid maps Wyoming Game and Fish Department's boundary.
How much public or protected land is in Deer Hunt Area 21 Thunder Basin?
HuntGrid's public land layers map about 405 km² of public or protected land, 18% of the unit; the largest share is managed by Unknown. Public land doesn't always mean you can hunt there.
Where are the season dates for Deer Hunt Area 21 Thunder Basin?
This page lists 2 seasons a person has checked against Wyoming Game and Fish Department's regulations; the official regulations have the final word.
Which units are next to Deer Hunt Area 21 Thunder Basin?
In the same unit system: Deer Hunt Area 3 Keyhole, Deer Hunt Area 8 Upton-Four Horse, Deer Hunt Area 10 Rochelle Hills, Deer Hunt Area 18 Campbell, Deer Hunt Area 19 Pumpkin Buttes and Deer Hunt Area 22 Douglas.
More on huntgrid.net
Sources
Unit boundary: Wyoming Game and Fish Department. Licence: Wyoming Game and Fish Department, State of Wyoming (published "as is" with a no-warranty disclaimer). Boundaries for the 2026 season.
HuntGrid isn't affiliated with Wyoming Game and Fish Department. The official regulations and maps have the final word.