Colorado GMU 66 Elk Hunting
Gunnison, Hinsdale and Saguache counties, southwest Colorado · 899 sq mi
Based on the EASIEST unit-wide bull 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 spans 899 square miles across Gunnison, Hinsdale, and Saguache counties in southwestern Colorado, rising from 7,200 feet to 14,300 feet with a typical elevation around 10,200 feet. The terrain is mixed, with substantial steep ground: 32% of the unit is gentle, 42% is moderate, 24% is steep, and 2% is rugged. This varied topography offers different hunting prospects across elevation bands, though steeper terrain becomes more prevalent as elevation increases.
Approximately 80% of the unit is generally open to public hunting on BLM, National Forest, and State Wildlife Areas, with the remaining 20% in private ownership. The public land is distributed across three main agencies—45% BLM, 35% U.S. Forest Service, and 0.1% State Wildlife Area—giving hunters multiple entry points and management jurisdictions to navigate. Access depends on specific road and trailhead conditions rather than blanket availability, so hunters should verify current conditions and seasonal closures before committing to a hunt plan.
Elk distribution across GMU 66 reflects strong seasonal movement. Summer Range covers 98% of the unit, with concentrated elk use on 64% of that area. Migration Corridors occupy 60% of the unit, indicating significant fall movement. Winter Range covers 47% of the unit, with concentrated use on 20% of that area. Only 2% of the unit supports Resident Population mapping, meaning most elk are migratory rather than year-round residents. Through the fall hunting season, elk move from summer areas toward winter range, with the highest hunter success likely coming during the transition periods when elk pass through migration corridors.
GMU 66 offers six seasons: Archery (September 2–30, either-sex), Muzzleloader (September 12–20, antlerless/bull), and four rifle seasons—1st Rifle (October 14–18), 2nd Rifle (October 24–November 1), 3rd Rifle (November 7–15), and 4th Rifle (November 18–22), all antlerless/bull. The Archery season overlaps the rut onset and primary rut phases, while the Muzzleloader season falls entirely in the primary rut. Rifle seasons span the late rut through migration and early winter range, with September highs averaging 63°F cooling to November highs around 41°F. Draw difficulty for the easiest unit-wide bull or either-sex code available to adult Colorado residents is moderate, requiring 1–2 preference points, though premium bull seasons require substantially more. Overall hunter pressure on the unit is low.
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
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 elk live in the unit
Colorado Parks & Wildlife maps elk seasonal ranges statewide. This is how much of GMU 66 each range covers — the single best clue to whether elk are here in September, in November, or only passing through. The layers overlap, so they do not add to 100%.
- Overall Range100%the full extent of range CPW maps for elk — near 100% on most units, and not a statement about when elk are present
- Summer Range98%used in summer
- Summer Concentration64%where elk bunch up in summer
- Migration Corridors60%movement between ranges, not residence
- Winter Range47%used in winter
- Winter Concentration20%where elk bunch up in winter
- Resident Population2%the only layer that means year-round use
Elk seasons & weapons (2026)
| Season | Dates | Tags offered |
|---|---|---|
| Archery | September 2 – September 30 | Either-sex |
| Muzzleloader | September 12 – September 20 | Antlerless, Bull |
| 1st Rifle | October 14 – October 18 | Antlerless, Bull |
| 2nd Rifle | October 24 – November 1 | Antlerless, Bull |
| 3rd Rifle | November 7 – November 15 | Antlerless, Bull |
| 4th Rifle | November 18 – November 22 | Antlerless, Bull |
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 elk hunting FAQ
Is this unit realistic for someone with no preference points?
The easiest unit-wide bull or either-sex code for an adult Colorado resident draws at 1–2 preference points, so hunters with zero points are not likely to draw the most straightforward hunts. However, this unit also holds premium bull seasons that require much higher point totals, so checking the full draw breakdown for all available codes is necessary before deciding whether to apply.
When is elk density highest during the hunting season?
Summer Concentration covers 64% of the unit, but most hunting occurs after summer ends. Fall migration concentrates elk as they move between summer and winter ranges across 60% of the unit designated as Migration Corridors, making the 1st and 2nd Rifle seasons (October 14–November 1) likely to encounter more elk than the early Archery and Muzzleloader seasons. Winter Concentration, covering only 20% of the unit, indicates that late-season (November) elk are more scattered across winter ground.
Can a foot hunter actually access 80% of the unit?
While 80% of GMU 66 is publicly owned or managed for hunting, access depends on specific roads, trailheads, and seasonal closures that are not uniform across the unit. The 45% BLM, 35% Forest Service, and 0.1% State Wildlife Area lands offer multiple entry points, but hunters must verify current access conditions and any seasonal restrictions before planning a hunt.
Does the rut timeline favor any particular season here?
The Archery season (September 2–30) spans both rut onset (September 1–10) and primary rut (September 11–30), capturing the peak calling window. The Muzzleloader season (September 12–20) is entirely within primary rut. By the 1st Rifle season (October 14–18), the rut is in late or post-rut recovery phases, so early seasons generally offer better calling conditions than rifle hunts.
How much of the unit should a hunter expect to cover on foot?
With 32% gentle terrain and 42% moderate terrain, roughly two-thirds of the unit is reasonably hikeable, while 26% is steep or rugged. The steep terrain is interspersed throughout the unit rather than concentrated in one area, so foot hunters can find walkable country but should expect elevation gain and varied gradient depending on their specific approach and target area.
Do elk stay in the unit after October, or do they migrate to private land?
CPW maps Migration Corridors across 60% of the unit from November onward and Winter Range across 47% of the unit, indicating that elk remain present through late fall and into winter. However, Winter Concentration covers only 20% of the unit, meaning elk are more dispersed on winter ground than they are in summer; some elk may shift to private land as winter deepens, but the mapping shows winter elk presence across substantial public acreage.
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 — Elk 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
- CPW — Maps and GIS (Species Activity Mapping) — elk seasonal range
- CPW — State Trust Land Finder — which State Trust acreage is enrolled and open to public hunting
- Federal and state land-ownership datasets — land ownership and access
- NOAA climate normals — 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 August 27, 2026.