Colorado GMU 10 Elk Hunting
Moffat and Rio Blanco counties, northwest Colorado · 831 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 10 is like
GMU 10 spans 831 square miles across Moffat and Rio Blanco counties in northwestern Colorado. The unit rolls from low elevations near 5,000 feet to highs above 8,700 feet, with typical terrain around 6,100 feet. The landscape is predominantly gentle, with 67% of the unit lying in gentle terrain, 26% moderate, and 6% steep; only 1% qualifies as rugged. This composition—roughly two-thirds gentle rolling country with some steeper breaks—defines the character of the unit.
BLM land makes up approximately 62% of the unit (about 512 square miles) and is generally open to public hunting. Colorado State Trust Land covers roughly 3.3% of the unit, though access to it depends on enrollment in CPW's Public Access Program and varies by parcel. National Park Service ground comprises about 13% and is closed to hunting. Private land accounts for the remaining 22%. A hunter planning to hunt here should expect to spend most time on BLM country, but will need to verify access arrangements on any State Trust parcels under consideration.
Elk use the unit across multiple seasonal ranges. Winter Range and Overall Range each cover 100% of the unit's mapped extent, but overall range is the full possible occupancy zone, not proof of year-round presence. Resident Population, which indicates year-round elk use, covers only 7% of the unit. Winter Concentration, where elk cluster during the cold season, covers 58% of the unit. Summer Range extends across 30% of the unit, with Summer Concentration on 15%. Migration Corridors span 7%. This distribution reflects a unit with substantial winter elk occupation concentrated in specific areas, moderate summer presence, and some seasonal movement.
The unit offers eight seasons open to public drawing: Archery (September 2–30, either-sex); Muzzleloader (September 12–20, antlerless and bull); Early Rifle (October 1–11, either-sex); four numbered rifle seasons running October 14 through November 22 (first through fourth rifle, all antlerless); and Late Rifle (December 1–31, antlerless). Two additional seasons—a private-land-only hunt and a Ranching for Wildlife option—are restricted. The archery season coincides with rut onset and the primary rut, offering opportunity during active bugling. Muzzleloader hunting occurs during the primary rut. Early rifle overlaps late rut and early post-rut behavior. The four numbered rifle seasons progress through post-rut recovery and migration transition periods. Late rifle occurs on the winter range. Temperatures cool dramatically across the fall, from September highs around 75°F to November highs near 46°F, with increasing snow potential as the season advances. Draw difficulty for the easiest unit-wide bull or either-sex hunt available to adult Colorado residents is rated Elite, requiring 20 or more preference points. Hunter pressure on the unit is low.
Terrain & elevation
- Elevation
- 5,000–8,700 ft, typically around 6,100 ft
- Steepness
- Moderate — mean slope 9.6°
- Slope breakdown
- 67% gentle · 26% moderate · 6% steep · 1% rugged
- Ground you can count on
- ~512 sq mi, plus ~27 sq mi of State Trust Land where access depends on enrollment
Land & access
About 62% of GMU 10 is public land a hunter can count on — BLM. A further 3% is State Trust Land, which is huntable only where CPW has enrolled it. Another 13% is public but closed to hunting — National Park Service.
- BLM62%
- State Trust Land3%
- National Park Service13%
- Private22%
Colorado State Trust Land is open to public hunting only where it is enrolled in CPW's Public Access Program. Check current enrollment before planning around it.
Where elk live in the unit
Colorado Parks & Wildlife maps elk seasonal ranges statewide. This is how much of GMU 10 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%.
- Winter Range100%used in winter
- 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
- Winter Concentration58%where elk bunch up in winter
- Summer Range30%used in summer
- Summer Concentration15%where elk bunch up in summer
- Migration Corridors7%movement between ranges, not residence
- Resident Population7%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 |
| 2nd Rifle | October 24 – November 1 | Antlerless |
| 3rd Rifle | November 7 – November 15 | Antlerless |
| 4th Rifle | November 18 – November 22 | Antlerless |
| Early Rifle | October 1 – October 11 | Either-sex |
| Late Rifle | December 1 – December 31 | Antlerless |
| Private-land only | August 15 – January 15 | Antlerless |
| Ranching for Wildlife | September 26 – October 7 | Either-sex, Antlerless |
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 75°F, lows around 46°F (mid-elevation normals)
- October — highs around 61°F, lows around 34°F, about 0.8 in of snow (mid-elevation normals)
- November — highs around 46°F, lows around 23°F, about 1.7 in of snow (mid-elevation normals)
GMU 10 elk hunting FAQ
Is this unit realistic for someone with no preference points?
No. The draw difficulty is rated Elite, meaning the easiest unit-wide bull or either-sex hunt available to adult Colorado residents requires 20 or more preference points to draw reliably. Applicants with zero or very few points should not count on drawing a public tag here.
Where do elk concentrate during the hunting season?
Winter Concentration covers 58% of the unit, indicating significant clustering of elk during the cold months. Summer Concentration is present on 15% of the unit during warmer periods. The mapped range layers do not indicate the geographic location of these concentration areas—only that clustering occurs on roughly those portions of the unit during each season.
How much ground can a public-land hunter actually count on hunting here?
Approximately 512 square miles, or 62% of the unit, is BLM land that is generally open to public hunting. An additional 27 square miles of Colorado State Trust Land is access-dependent; whether it can be hunted depends on CPW enrollment in the Public Access Program. Access to any of these lands still requires verifying specific roads, trailheads, and seasonal closures.
Which season offers the best chance to hunt elk during the rut?
Archery (September 2–30) spans rut onset into the primary rut, offering the most extended and active rut hunting window. Muzzleloader (September 12–20) and Early Rifle (October 1–11) both occur during rut or late-rut periods, though with shorter seasons. Later rifle hunts occur after the peak rut and into winter range occupation.
Is the terrain manageable for a hunter on foot?
Yes. Roughly two-thirds of the unit is gentle terrain, and most of the remainder is moderate. Only 1% is classified as rugged. A foot hunter should find accessible country across much of the unit, though the steep breaks scattered throughout will still present challenges in some areas.
Do elk occupy this unit year-round?
The mapped Resident Population layer, which indicates year-round use, covers only 7% of GMU 10. Winter Range extends across the full unit, making winter occupation certain, but summer elk presence is more limited, covering 30% of the unit. This pattern suggests significant seasonal movement rather than year-round distribution across most of the area.
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.