GMU · Idaho Department of Fish and Game
Unit 21
Idaho, 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 Unit 21
Unit 21 is a GMU in Idaho, United States, set by Idaho Department of Fish and Game. It covers about 1,319 km² (509 mi²). No town of the HuntGrid list lies inside it; the nearest is Salmon, about 27 km from its edge.
HuntGrid draws its boundary from Idaho Department of Fish and Game's data for the 2026 season. The agency's regulations say which species and seasons use it.
- Unit code
- 21
- Area
- 1,319 km²
- Area (miles)
- 509 mi²
- Boundaries
- 2026
Public and protected land mapped inside it
HuntGrid's public land layers map about 1,302 km² of public or protected land inside it, 99% 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 |
|---|---|---|
| Forest Service Region 04 Intermountain | 1,301 | 99% |
| Forest Service Region 01 Northern | 0.8 | under 1% |
| Idaho Department of Fish and Game | 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 Idaho Department of Fish and Game's regulations:
| Species | Dates | Details |
|---|---|---|
| Cougar (mountain lion) | Jul 1, 2026 to Jun 30, 2027 | source |
| Grey wolf | Jul 1, 2026 to Jun 30, 2027 | source |
| American black bear | Aug 30, 2026 to Nov 30, 2026 | source |
| Wild turkey | Aug 30, 2026 to Dec 31, 2026 | source |
| Mule deer | Oct 10, 2026 to Oct 31, 2026 | antlerless source |
| White-tailed deer | Oct 10, 2026 to Oct 31, 2026 | antlerless source |
| White-tailed deer | Oct 10, 2026 to Oct 31, 2026 | antlered source |
| White-tailed deer | Oct 10, 2026 to Oct 31, 2026 | antlerless source |
| White-tailed deer | Nov 1, 2026 to Dec 9, 2026 | antlered source |
| White-tailed deer | Nov 1, 2026 to Dec 31, 2026 | antlerless source |
| American black bear | Apr 1, 2027 to Jun 30, 2027 | source |
| Wild turkey | Apr 8, 2027 to May 25, 2027 | bearded source |
The official regulations have the final word: check them before you hunt.
Units around it
Next to it in the same unit system
Other hunting units that cover part of it
- Canada Geese Area 1 (Canada goose area)
- Duck Area 1
- White-fronted Geese Area 2 (white-fronted goose area)
- Light Geese Area 2 (light goose area)
- Deer controlled hunt area 21
- Deer controlled hunt area 21-1
- Deer controlled hunt area 21-1X
- Rocky Mtn Sheep controlled hunt area 20*
- Rocky Mtn Sheep controlled hunt area 21*
- Rocky Mtn Sheep controlled hunt area 21L*
- Salmon Elk Zone
- Turkey controlled hunt area 21-1
What HuntGrid shows for Unit 21
- 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 Unit 21 (GMU)?
About 1,319 km² (509 mi²), as HuntGrid maps Idaho Department of Fish and Game's boundary.
How much public or protected land is in Unit 21?
HuntGrid's public land layers map about 1,302 km² of public or protected land, 99% of the unit; the largest share is managed by Forest Service Region 04 Intermountain. Public land doesn't always mean you can hunt there.
Where are the season dates for Unit 21?
This page lists 12 seasons a person has checked against Idaho Department of Fish and Game's regulations; the official regulations have the final word.
Which units are next to Unit 21?
In the same unit system: Unit 17, Unit 20, Unit 20A, Unit 21A, Unit 27 and Unit 28.
More on huntgrid.net
Sources
Unit boundary: Idaho Department of Fish and Game. Licence: Idaho Department of Fish and Game (published with a no-warranty disclaimer). Boundaries for the 2026 season.
HuntGrid isn't affiliated with Idaho Department of Fish and Game. The official regulations and maps have the final word.