Colorado GMU 66 Pronghorn Hunting
Gunnison, Hinsdale and Saguache counties, southwest Colorado · 899 sq mi
Based on the EASIEST unit-wide buck or either-sex hunt code available to adult Colorado residents in the 2026 primary draw — the lowest preference-point tier that drew reliably. Private-land-only and Ranching for Wildlife hunts are excluded because neither is a unit-wide public-land opportunity — NOT because the public cannot draw them. A private-land-only license requires the hunter's own permission to hunt private ground; a Ranching for Wildlife license is valid on the participating ranches enrolled in that program. They are separate systems. Other weapons, seasons and nonresident applicants can require substantially more points. The band is a floor, not a target: even the easiest qualifying hunt here sits in that range.
What hunting GMU 66 is like
GMU 66 spreads across 899 square miles in Gunnison, Hinsdale and Saguache counties in Colorado's southwest region. The unit's elevation ranges from 7,200 feet to 14,300 feet, with typical elevation around 10,200 feet. Terrain is mixed, with substantial steep ground: 32% of the area is gentle, 42% moderate, 24% steep, and 2% rugged. The unit encompasses high desert and mountain country suitable for pronghorn hunting.
Approximately 80% of the unit (roughly 719 square miles) is open to public hunting. That ground is managed by the Bureau of Land Management, U.S. Forest Service, and State Wildlife Areas. The BLM controls 45% of the unit, the Forest Service 35%, and State Wildlife Areas less than 1%. The remaining 20% is private land. Public ownership alone does not determine access; roads, trailheads, seasonal closures and private inholdings all affect where a hunter can actually reach.
Pronghorn range in this unit is limited. CPW maps Overall Range covering 14% of the unit, and Winter Range covering 1%. There is no mapped Winter Concentration. These small seasonal-range shares indicate that pronghorn use is restricted to a portion of the available country, concentrated in particular locations rather than spread across the full unit.
The unit offers three seasons to public applicants: Archery from August 15 to September 20 for bucks, Muzzleloader from September 21 to September 29 for bucks, and Rifle from October 3 to October 11 for bucks. Archery falls during the pre-rut and primary rut phases. Muzzleloader straddles the primary rut and late rut phases. Rifle occurs entirely in the late rut phase. In September, typical mid-elevation temperatures range from highs near 63°F to lows near 36°F, with minimal snowfall. October brings cooling to highs near 53°F and lows near 27°F, with average snowfall around 3.2 inches. The unit draws at premium difficulty—requiring 10 to 19 preference points for the easiest qualifying buck hunt. Hunter pressure is low overall.
Terrain & elevation
- Elevation
- 7,200–14,300 ft, typically around 10,200 ft
- Steepness
- Steep — mean slope 17.4°
- Slope breakdown
- 32% gentle · 42% moderate · 24% steep · 2% rugged
- Ground you can count on
- ~719 sq mi
Habitat & cover
What actually grows here, by elevation. Each band adds to 100% on its own — these are shares of that band, not of GMU 66.
Lower elevations
- Sagebrush62%
- Conifer24%
- Aspen5%
- Other cover5%
- Riparian2%
- Grass and meadow1%
Mid elevations
- Conifer57%
- Aspen19%
- Sagebrush13%
- Grass and meadow8%
- Riparian2%
Higher elevations
- Conifer43%
- Grass and meadow33%
- Other cover15%
- Aspen5%
- Riparian3%
- Sagebrush1%
Cover classes from the USGS National Land Cover Database, split into elevation bands. “Other cover” is the remainder of the classification — bare ground, water, agriculture and developed land — and is left unnamed rather than guessed at.
Land & access
About 80% of GMU 66 is public land a hunter can count on — BLM, National Forest and State Wildlife Areas.
- BLM45%
- National Forest35%
- State Wildlife Area<1%
- Private20%
Where pronghorn live in the unit
Colorado Parks & Wildlife maps pronghorn seasonal ranges statewide. This is how much of GMU 66 each range covers — the single best clue to whether pronghorn are here in September, in November, or only passing through. The layers overlap, so they do not add to 100%.
- Overall Range14%the full extent of range CPW maps for pronghorn — near 100% on most units, and not a statement about when pronghorn are present
- Winter Range1%used in winter
- Winter Concentration<1%where pronghorn bunch up in winter
Pronghorn seasons & weapons (2026)
| Season | Dates | Tags offered |
|---|---|---|
| Archery | August 15 – September 20 | Buck |
| Muzzleloader | September 21 – September 29 | Buck |
| Rifle | October 3 – October 11 | Buck |
Dates span every hunt code of that type in this unit and can differ by code. Confirm the current brochure with Colorado Parks & Wildlife before applying.
Fall weather
- September — highs around 63°F, lows around 36°F (mid-elevation normals)
- October — highs around 53°F, lows around 27°F, about 3.2 in of snow (mid-elevation normals)
- November — highs around 41°F, lows around 16°F, about 12 in of snow (mid-elevation normals)
GMU 66 pronghorn hunting FAQ
Is this unit realistic for someone with few or no preference points?
The easiest buck hunt here requires 10–19 points in the primary draw, so zero-point applicants cannot reliably draw through that route. Alternative pathways exist: the Secondary Draw (a separate June draw open to anyone using no preference points) and the Leftover List (first-come, first-served after the primary draw closes) may offer opportunities depending on tag availability that year.
How much ground can a public-land hunter actually plan to hunt here?
Approximately 719 square miles are open to public hunting across BLM, Forest Service, and State Wildlife Areas. However, public ownership does not guarantee access; road systems, trailheads, seasonal closures, and private inholdings all affect where a hunter can legally reach and hunt. Scouting access before applying is essential.
Where should a hunter focus on GMU 66's large land base?
Pronghorn range is concentrated in a small portion of the unit: CPW maps Overall Range covering 14% and Winter Range covering only 1%. This means pronghorn are not distributed across the full 899 square miles but are restricted to particular areas. A hunter's success depends on locating and hunting those seasonal-range zones.
How does the terrain affect hunting here?
The unit is mixed, with substantial steep ground: 32% gentle, 42% moderate, 24% steep, and 2% rugged. Elevations span from 7,200 to 14,300 feet, creating diverse country. Hunters should expect to navigate varied terrain, including significant steep sections, rather than rolling or uniform landscape.
Which season offers the best conditions for hunting this unit?
Archery (August 15–September 20) occurs during pre-rut and primary rut, with mild temperatures (highs near 63°F) and minimal snow—ideal hiking and field conditions. Rifle (October 3–11) provides late-season hunting but occurs entirely in the late rut phase, during cooler weather (highs near 53°F) and average snowfall of 3.2 inches, which can complicate access and visibility.
What should a hunter understand about draw difficulty for this unit?
Premium difficulty means 10–19 points required for the easiest buck hunt; this band describes the primary draw only and applies to adult Colorado residents. The unit also holds at least one premium buck season requiring substantially more points. Draw difficulty and overall hunter pressure are separate: this unit is both hard to draw and experiences low hunting pressure.
Data sources & methodology
- Colorado Parks & Wildlife — Big Game hunting — seasons, weapons, hunt codes and license types
- CPW — Primary Draw rules — how preference points and the hybrid draw work
- CPW — Pronghorn statistics, draw recap and Drawn Out At reports — the point levels behind the draw-difficulty bands
- CPW — Secondary Draw — licenses remaining after the primary draw
- USGS / MRLC — National Land Cover Database — habitat and cover classes by elevation band
- CPW — Maps and GIS (Species Activity Mapping) — pronghorn seasonal range
- CPW — State Trust Land Finder — which State Trust acreage is enrolled and open to public hunting
- USGS PAD-US — Protected Areas Database of the United States — land ownership and access
- Daymet daily climate, 1991–2020 (Oak Ridge National Laboratory) — fall weather
Draw difficulty is a qualitative band, not published odds — the note under the summary above states exactly which hunt code it describes. Land shares are separate, non-overlapping categories: publicly owned is not the same as open to hunting, and State Trust Land is huntable only where CPW has enrolled it. Unit data last updated September 24, 2026.