Colorado GMU 81 Mule Deer Hunting
Alamosa, Archuleta, Conejos and Rio Grande counties, southwest Colorado · 1,214 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 81 is like
GMU 81 spans 1,214 square miles across four counties in southwestern Colorado and ranges from 7,400 feet to 13,300 feet in elevation. The terrain is rolling, with some steeper breaks: 69 percent is gentle, 22 percent moderate, and 9 percent steep or rugged. The unit offers a mix of elevations and country suitable for early-season hunts in September and progressively cooler conditions through November.
About 63 percent of the unit—roughly 768 square miles—is generally open to public hunting. The National Forest holds 39 percent of the unit, BLM another 23 percent, and State Wildlife Areas 1.3 percent. State Trust Land comprises 7.7 percent of the unit; access to these parcels depends on enrollment in CPW's Public Access Program. Private land accounts for the remaining 29 percent. A hunter's actual access to public ground depends on roads, trailheads, and inholdings that may fragment the landscape.
Mule deer occupy 57 percent of the unit as summer range and 31 percent as winter range, with 10 percent classed as winter concentration ground where deer cluster seasonally. Migration corridors cover 2 percent. The seasonal range data suggests that as the fall progresses and weather cools—from September highs near 69 degrees Fahrenheit to November highs around 46 degrees—hunters should expect deer to shift toward winter concentration areas. Timing and extent of that movement vary with weather and snow.
The unit offers five seasons to public applicants: Archery (September 2–30), Muzzleloader (September 12–20), and three rifle seasons—2nd Rifle (October 24–November 1), 3rd Rifle (November 7–15), and 4th Rifle (November 18–22). Archery, Muzzleloader, 2nd Rifle and 3rd Rifle carry doe and buck tags, while 4th Rifle is buck-only. Archery and Muzzleloader fall during the Velvet Shed / Early Fall Transition phase when bucks are still in bachelor groups. The 2nd Rifle season spans the Early Fall Migration / Nocturnal Buck Phase and the beginning of Early Pre-Rut staging. The 3rd Rifle season covers Early Pre-Rut staging and the Primary Rut, while the 4th Rifle season sits entirely within the Primary Rut. Draw difficulty is moderate (1–2 preference points for the easiest unit-wide either-sex code available to adult Colorado residents), though premium buck seasons require substantially more points.
Terrain & elevation
- Elevation
- 7,400–13,300 ft, typically around 8,900 ft
- Steepness
- Gentle — mean slope 8.5°
- Slope breakdown
- 69% gentle · 22% moderate · 8% steep · 1% rugged
- Ground you can count on
- ~768 sq mi, plus ~94 sq mi of State Trust Land where access depends on enrollment
Land & access
About 63% of GMU 81 is public land a hunter can count on — National Forest, BLM and State Wildlife Areas. A further 8% is State Trust Land, which is huntable only where CPW has enrolled it.
- National Forest39%
- BLM23%
- State Wildlife Area1%
- State Trust Land8%
- Unclassified ownership<1%
- Private29%
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 81 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
- Summer Range57%used in summer
- Winter Range31%used in winter
- Winter Concentration10%where mule deer bunch up in winter
- Migration Corridors2%movement between ranges, not residence
Mule Deer seasons & weapons (2026)
| Season | Dates | Tags offered |
|---|---|---|
| Archery | September 2 – September 30 | Doe, Buck |
| Muzzleloader | September 12 – September 20 | Doe, Buck |
| 2nd Rifle | October 24 – November 1 | Doe, Buck |
| 3rd Rifle | November 7 – November 15 | Doe, Buck |
| 4th Rifle | November 18 – November 22 | 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 69°F, lows around 39°F (mid-elevation normals)
- October — highs around 58°F, lows around 28°F, about 1.6 in of snow (mid-elevation normals)
- November — highs around 46°F, lows around 17°F, about 4 in of snow (mid-elevation normals)
GMU 81 mule deer hunting FAQ
How much ground can a public-land hunter actually count on here?
About 63 percent of the unit—roughly 768 square miles—is generally open to public hunting via the National Forest, BLM, and State Wildlife Areas. An additional 7.7 percent is State Trust Land, but hunting those parcels depends on CPW's Public Access Program enrollment and varies by parcel. The remaining 29 percent is private land. Actual access depends on roads, trailheads, and how private inholdings fragment the landscape.
Is this a realistic draw for someone with no preference points?
The easiest unit-wide either-sex code draws in the moderate range at 1–2 preference points for adult Colorado residents, meaning someone with zero points faces stiff competition. However, the unit holds those tags reliably at that point level across multiple seasons, so entry is possible for a new applicant who draws early. Premium buck seasons require substantially more points and are not realistic for a new applicant.
Does this unit suit early or late-season hunting better?
Archery and Muzzleloader seasons fall during the Velvet Shed / Early Fall Transition when bucks are still grouped in bachelor patterns and September temperatures are mild (highs near 69 degrees Fahrenheit). Late-season rifle hunts from mid-November onward fall during the Primary Rut when bucks are actively seeking does. Choice depends on whether a hunter prefers lighter conditions and bachelor-pattern behavior or rut hunting; both are available here.
Should a hunter expect deer to concentrate in any particular area as the season progresses?
Winter concentration ground comprises 10 percent of the unit where mule deer cluster seasonally. As temperatures cool from September highs near 69 degrees Fahrenheit to November highs around 46 degrees and snowfall increases, hunters should expect deer to shift toward these concentration areas. The timing and extent of movement vary with weather and snow depth.
Is the terrain manageable for a hunter on foot?
The unit is 69 percent gentle terrain and 22 percent moderate, making it largely walkable for most hunters. Steep or rugged ground comprises 9 percent of the unit and is scattered throughout. The rolling character with some steeper breaks means a hunter should expect mixed conditions and should be comfortable with moderate elevation gains.
What does the draw-difficulty rating cover and what does it not?
The moderate 1–2 point rating describes the easiest unit-wide either-sex code available to adult Colorado residents in the primary draw. Premium buck seasons in the unit require substantially more preference points and are excluded from this assessment. Nonresident applicants, private-land-only hunts, and Ranching for Wildlife tags are also outside this scope.
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.