GMU · Colorado Parks and Wildlife
GMU 21
Colorado, 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 GMU 21
GMU 21 is a GMU in Colorado, United States, set by Colorado Parks and Wildlife. It covers about 2,300 km² (888 mi²). No town of the HuntGrid list lies inside it; the nearest is Fruita, about 47 km from its edge.
HuntGrid draws its boundary from Colorado Parks and Wildlife's data for the 2026 season. The agency's regulations say which species and seasons use it.
- Unit code
- 21
- Area
- 2,300 km²
- Area (miles)
- 888 mi²
- Boundaries
- 2026
Public and protected land mapped inside it
HuntGrid's public land layers map about 2,024 km² of public or protected land inside it, 88% 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 |
|---|---|---|
| Bureau of Land Management | 1,996 | 87% |
| Colorado Parks & Wildlife | 25 | 1% |
| Colorado State Land Board | 3.1 | under 1% |
| Private owners (names not shown) | 0.0 | under 1% |
| The State of Utah School and Institutional Trust Lands Administration | 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 Colorado Parks and Wildlife's regulations:
| Species | Dates | Details |
|---|---|---|
| American black bear | Oct 24, 2026 to Nov 1, 2026 | rifle source |
| Elk (wapiti) | Oct 24, 2026 to Nov 1, 2026 | antlerless, rifle, draw source |
| Elk (wapiti) | Oct 24, 2026 to Nov 1, 2026 | antlered, rifle source |
| Mule deer | Oct 24, 2026 to Nov 1, 2026 | antlered, rifle, draw source |
| White-tailed deer | Oct 24, 2026 to Nov 1, 2026 | antlered, rifle, draw source |
| American black bear | Nov 7, 2026 to Nov 15, 2026 | rifle source |
| Elk (wapiti) | Nov 7, 2026 to Nov 15, 2026 | antlerless, rifle, draw source |
| Elk (wapiti) | Nov 7, 2026 to Nov 15, 2026 | antlered, rifle source |
| Mule deer | Nov 7, 2026 to Nov 15, 2026 | antlered, rifle, draw source |
| White-tailed deer | Nov 7, 2026 to Nov 15, 2026 | antlered, rifle, draw source |
| American black bear | Nov 18, 2026 to Nov 22, 2026 | rifle source |
| Elk (wapiti) | Nov 18, 2026 to Nov 22, 2026 | rifle, draw source |
| Elk (wapiti) | Nov 18, 2026 to Nov 22, 2026 | antlerless, rifle, draw source |
| Cougar (mountain lion) | Nov 23, 2026 to Mar 31, 2027 | 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
What HuntGrid shows for GMU 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 GMU 21?
About 2,300 km² (888 mi²), as HuntGrid maps Colorado Parks and Wildlife's boundary.
How much public or protected land is in GMU 21?
HuntGrid's public land layers map about 2,024 km² of public or protected land, 88% of the unit; the largest share is managed by Bureau of Land Management. Public land doesn't always mean you can hunt there.
Where are the season dates for GMU 21?
This page lists 14 seasons a person has checked against Colorado Parks and Wildlife's regulations; the official regulations have the final word.
Which units are next to GMU 21?
In the same unit system: GMU 10, GMU 22, GMU 30 and GMU 31.
More on huntgrid.net
Sources
Unit boundary: Colorado Parks and Wildlife. Boundaries for the 2026 season.
HuntGrid isn't affiliated with Colorado Parks and Wildlife. The official regulations and maps have the final word.