Colorado GMU 10 Mule Deer Hunting
Moffat and Rio Blanco counties, northwest Colorado · 831 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 10 is like
GMU 10 covers 831 square miles across Moffat and Rio Blanco counties in Colorado's northwest region. The unit spans from 5,000 feet at its low points to 8,700 feet at its high, with a typical elevation around 6,100 feet. Terrain is predominantly rolling, with some steeper breaks: 67% of the unit is gentle, 26% moderate, 6% steep, and 1% rugged. The landscape supports mule deer across a range of elevations and aspects, from lower-elevation breaks through mid-elevation country to higher benches.
Public land dominates access. Approximately 62% of the unit, roughly 512 square miles, is Bureau of Land Management ground that is generally open to public hunting. An additional 3.3% is Colorado State Trust Land, huntable only where enrolled in CPW's Public Access Program—access here is enrollment-dependent and should be verified before planning a hunt. About 13% of the unit is National Park Service land, which is closed to hunting. The remaining 22% is private land. Together, public ownership accounts for roughly 78% of the unit, though the actually huntable share depends on State Trust Land enrollment status.
Mule deer occupy broad seasonal ranges across the unit. Winter Range covers 92% of the total area, with concentrated-use ground making up 40% of the unit—mule deer cluster substantially in winter rather than spreading evenly. Summer Range covers 74% of the unit. Migration Corridors account for 4%. As the fall season progresses from September through November, hunters should expect mule deer to shift gradually toward winter ground and concentration areas, though timing and extent depend on snow and weather.
The unit offers five seasons. Four are available to public applicants: Archery from September 2 to September 30 (buck only), Muzzleloader from September 12 to September 20 (buck only), 2nd Rifle from October 24 to November 1 (buck only), and 3rd Rifle from November 7 to November 15 (buck only). A fifth season, Ranching for Wildlife (buck only), is available but with no published dates. The Archery and Muzzleloader seasons fall during velvet-shed transition in early September. The 2nd Rifle season straddles the shift from early fall migration into early pre-rut staging. The 3rd Rifle season spans early pre-rut staging into the primary rut in November. Overall hunter pressure on the unit is low. Draw difficulty is hard, requiring 3 to 5 preference points for the easiest qualifying unit-wide buck hunt available to adult Colorado residents.
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 mule deer live in the unit
Colorado Parks & Wildlife maps mule deer seasonal ranges statewide. This is how much of GMU 10 each range covers — the single best clue to whether mule deer 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 mule deer — near 100% on most units, and not a statement about when mule deer are present
- Winter Range92%used in winter
- Summer Range74%used in summer
- Winter Concentration40%where mule deer bunch up in winter
- Migration Corridors4%movement between ranges, not residence
Mule Deer seasons & weapons (2026)
| Season | Dates | Tags offered |
|---|---|---|
| Archery | September 2 – September 30 | Buck |
| Muzzleloader | September 12 – September 20 | Buck |
| 2nd Rifle | October 24 – November 1 | Buck |
| 3rd Rifle | November 7 – November 15 | Buck |
| Ranching for Wildlife | Dates vary by hunt code | 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 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 mule deer hunting FAQ
How much ground can a public-land hunter actually count on?
Approximately 62% of the unit is BLM land generally open to public hunting, around 512 square miles. An additional 3.3% is State Trust Land that may be huntable only if enrolled in CPW's Public Access Program—verify enrollment status before the season. National Park Service land (13%) is closed to hunting, and 22% is private. Hunters should confirm road and trailhead access before planning, as ownership alone does not guarantee entry.
Is this unit realistic for someone with no preference points?
No. Draw difficulty is hard, requiring 3 to 5 preference points for the easiest unit-wide buck hunt available to adult Colorado residents. Applicants with zero points should expect not to draw in a typical year and should plan for preference-point accumulation if interested in this unit.
When should I hunt here—early or late season?
The timing depends on hunting style and mule deer behavior. Archery (September 2–30) and Muzzleloader (September 12–20) occur during velvet-shed transition with relatively mild conditions—September highs average 75°F. The 2nd Rifle season (October 24–November 1) spans early fall migration and early pre-rut staging with temperatures cooling to highs around 61°F. The 3rd Rifle season (November 7–15) overlaps early pre-rut staging and the primary rut when highs average 46°F and snowfall averages 1.7 inches for the month. Later seasons align with the rut but involve colder, snowier conditions.
Where should I focus my hunt in this unit?
Winter Range covers 92% of the unit, and mule deer concentrate substantially—winter concentration ground makes up 40% of the unit total. As fall advances from September toward November, expect mule deer to shift toward winter range and concentration areas, though timing and extent vary with snow and weather. Migration corridors comprise 4% of the unit; bucks move through these areas during the fall transitions. Summer Range covers 74% and is relevant to early-season hunts.
What terrain should I expect to hunt?
The unit is rolling with some steeper breaks. Two-thirds of the area is gentle; a quarter is moderate. Steep terrain accounts for 6% and rugged for just 1%, so most of the unit is negotiable on foot, though steeper sections are present in places. Elevation ranges from 5,000 feet to 8,700 feet, with typical country around 6,100 feet.
Does the draw difficulty label cover all hunts on this unit?
No. The 3–5 point range describes the easiest unit-wide buck hunt available to adult Colorado residents. Other weapons, seasons, and nonresident applicants can require substantially more points. The unit holds at least one premium buck season requiring far more preference points. Always check the current draw statistics for the specific hunt code before applying.
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 — Deer 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) — mule deer 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 31, 2026.