GMU 851

About GMU 851

GMU 851 is a GMU in Colorado, United States, set by Colorado Parks and Wildlife. It covers about 1,135 km² (438 mi²). No town of the HuntGrid list lies inside it; the nearest is Trinidad, about 1.9 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

851

Area

1,135 km²

Area (miles)

438 mi²

Boundaries

2026

Public and protected land mapped inside it

HuntGrid's public land layers map about 148 km² of public or protected land inside it, 13% of the unit. Some protected land is privately owned (a conservation group's, for one). By manager, as the source names it:

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:

The official regulations have the final word: check them before you hunt.

Official regulations: Colorado Parks and Wildlife

Units around it

Next to it in the same unit system

• GMU 83
• GMU 85
• GMU 134
• GMU 140

Other hunting units that cover part of it

• Central Flyway (regular season) (goose zone)
• Mountain/Foothills Zone (duck zone)
• S51 Spanish Peaks (Culebra) (bighorn sheep GMU)
• San Luis Valley (goose zone)
• Southeast Zone (duck zone)

What HuntGrid shows for GMU 851

• 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.

Open in HuntGrid

Questions

How big is GMU 851?

About 1,135 km² (438 mi²), as HuntGrid maps Colorado Parks and Wildlife's boundary.

How much public or protected land is in GMU 851?

HuntGrid's public land layers map about 148 km² of public or protected land, 13% of the unit; the largest share is managed by Colorado Parks & Wildlife. Public land doesn't always mean you can hunt there.

Where are the season dates for GMU 851?

This page lists 24 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 851?

In the same unit system: GMU 83, GMU 85, GMU 134 and GMU 140.

More on huntgrid.net

• Hunting map of Colorado
• HuntGrid, the hunting app

Sources

Unit boundary: Colorado Parks and Wildlife. Boundaries for the 2026 season.

• The agency's boundary data
• Official regulations

HuntGrid isn't affiliated with Colorado Parks and Wildlife. The official regulations and maps have the final word.