bighorn sheep GMU · Colorado Parks and Wildlife
S20 Marshall Pass
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 S20 Marshall Pass
S20 Marshall Pass is a bighorn sheep GMU in Colorado, United States, set by Colorado Parks and Wildlife. It covers about 360 km² (139 mi²). No town of the HuntGrid list lies inside it; the nearest is Salida, about 7.0 km from its edge.
HuntGrid draws its boundary from Colorado Parks and Wildlife's data for the 2026 season. The agency uses this unit system for Bighorn sheep.
- Unit code
- S20
- Area
- 360 km²
- Area (miles)
- 139 mi²
- Boundaries
- 2026
Public and protected land mapped inside it
HuntGrid's public land layers map about 322 km² of public or protected land inside it, 89% 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 02 Rocky Mountain | 298 | 83% |
| Bureau of Land Management | 20 | 6% |
| Colorado Parks & Wildlife | 3.5 | under 1% |
| Colorado State Land Board | 0.2 | under 1% |
| Town of Poncha Springs | 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 |
|---|---|---|
| Bighorn sheep | Sep 8, 2026 to Oct 31, 2026 | males, rifle, residents, draw 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 S20 Marshall Pass
- 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 S20 Marshall Pass (bighorn sheep GMU)?
About 360 km² (139 mi²), as HuntGrid maps Colorado Parks and Wildlife's boundary.
How much public or protected land is in S20 Marshall Pass?
HuntGrid's public land layers map about 322 km² of public or protected land, 89% of the unit; the largest share is managed by Forest Service Region 02 Rocky Mountain. Public land doesn't always mean you can hunt there.
Where are the season dates for S20 Marshall Pass?
This page lists 1 season a person has checked against Colorado Parks and Wildlife's regulations; the official regulations have the final word.
Which units are next to S20 Marshall Pass?
In the same unit system: S10 Trickle Mountain, S17 Collegiate South, S47 Browns Canyon and S68 Northern Sangre De Cristos.
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.