Colorado GMU 57 Mule Deer Hunting
Chaffee, Park and Fremont counties, central Colorado · 273 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 57 is like
Unit 57 spans 273 square miles across Chaffee, Park, and Fremont counties in central Colorado, occupying rolling to moderately steep terrain between 6,700 and 11,000 feet in elevation. The unit is 40 percent gentle and 46 percent moderate by area, with 14 percent steep slopes and 1 percent rugged ground. Early-season mule deer hunting here can mean hiking from lower-elevation sagebrush into mixed conifer and aspen at mid-elevation, while later seasons may take hunters higher as conditions change and deer shift.
The unit contains roughly 196 square miles of National Forest and BLM land open to public hunting—about 72 percent of the total area. An additional 4.3 percent is Colorado State Trust Land, but access to these parcels depends on CPW enrollment in the Public Access Program, which varies by parcel and year. The remainder is private land at approximately 24 percent. The publicly owned share across the unit totals about 76 percent, though private inholdings affect the continuity of access in some locations.
Mule deer occupy the unit through the fall. Summer range covers 97 percent of the unit, indicating broad distribution across the area's elevations during warmer months. Winter range spans 92 percent, but the mapping also identifies a winter concentration layer covering 36 percent of the unit, showing that deer cluster on specific ground as the season cools. Migration corridors cover 30 percent of the unit, meaning significant numbers of deer use these areas to move between seasonal ranges. Hunters should expect mule deer presence across much of the unit in September and early October, with concentrations intensifying on defined winter grounds as November approaches and snow accumulates, though the timing and extent of this consolidation vary with weather.
Six mule deer seasons are offered: Archery September 2–30 (either-sex), Muzzleloader September 12–20 (doe/buck), 2nd Rifle October 24–November 1 (doe/buck), 3rd Rifle November 7–15 (doe/buck), Late Rifle September 1–October 31 (doe), and a private-land-only hunt October 24–November 15 (doe). Public applicants can access five of these. Early archery and muzzleloader seasons run during the velvet-shed phase when bucks are still in bachelor groups and moving at dawn and dusk. The numbered rifle seasons overlap the early pre-rut and primary rut, when buck behavior changes and doe movements intensify. Late rifle spans the early season's bachelor pattern through the pre-rut phase, offering an alternative path into late October without pushing into peak rut timing. Draw difficulty for the unit's easiest unit-wide either-sex public hunt is moderate, requiring 1–2 preference points for an adult Colorado resident.
Terrain & elevation
- Elevation
- 6,700–11,000 ft, typically around 9,100 ft
- Steepness
- Steep — mean slope 14°
- Slope breakdown
- 40% gentle · 46% moderate · 14% steep · 1% rugged
- Ground you can count on
- ~196 sq mi, plus ~12 sq mi of State Trust Land where access depends on enrollment
Land & access
About 72% of GMU 57 is public land a hunter can count on — National Forest and BLM. A further 4% is State Trust Land, which is huntable only where CPW has enrolled it.
- National Forest55%
- BLM17%
- State Trust Land4%
- Unclassified ownership<1%
- Private24%
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 57 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 Range97%used in summer
- Winter Range92%used in winter
- Winter Concentration36%where mule deer bunch up in winter
- Migration Corridors30%movement between ranges, not residence
Mule Deer seasons & weapons (2026)
| Season | Dates | Tags offered |
|---|---|---|
| Archery | September 2 – September 30 | Either-sex |
| Muzzleloader | September 12 – September 20 | Doe, Buck |
| 2nd Rifle | October 24 – November 1 | Doe, Buck |
| 3rd Rifle | November 7 – November 15 | Doe, Buck |
| Late Rifle | September 1 – October 31 | Doe |
| Private-land only | October 24 – November 15 | Doe |
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 67°F, lows around 37°F, about 0.1 in of snow (mid-elevation normals)
- October — highs around 56°F, lows around 27°F, about 2.4 in of snow (mid-elevation normals)
- November — highs around 44°F, lows around 16°F, about 4.5 in of snow (mid-elevation normals)
GMU 57 mule deer hunting FAQ
Can a hunter with no preference points draw a public mule deer hunt in this unit?
Not for the easiest qualifying unit-wide hunt, which sits at 1–2 points for an adult Colorado resident in the primary draw. Hunters at zero points would need to apply for a harder-drawing hunt, wait for a draw year when the easier tiers clear more completely, or pursue a different unit. The private-land-only hunt is separate and does not help here.
Which seasons fall during mule deer rut, and when exactly does that happen in this unit?
The primary rut runs November 11–25. The 3rd Rifle season (November 7–15) spans the early pre-rut and primary rut phases, making it the main rut hunt. The 2nd Rifle season (October 24–November 1) overlaps early pre-rut staging. Early archery and muzzleloader happen during velvet shed in early September, well before the rut. Late Rifle (September 1–October 31) covers the pre-rut buildup but does not reach peak rut timing.
Is most of this unit huntable, or do private inholdings break it up significantly?
About 72 percent of the unit is National Forest and BLM ground open to public hunting, plus another 4.3 percent in State Trust Land if enrolled in the Public Access Program. That leaves roughly 24 percent private. While the public ownership is substantial, private land covers nearly a quarter of the total area, so hunters should verify access routes and expect some discontinuity when planning a trip.
Does the terrain here require backcountry fitness, or can a foot hunter get to good ground from a car?
The unit is 40 percent gentle and 46 percent moderate slope by area, so much ground can be reached on foot from lower elevations without extreme climbing. However, the span from 6,700 to 11,000 feet means elevation change is unavoidable for any hunt that chases seasonal movements. Roads, trailheads, and private boundaries all govern where a hunter actually enters, so scouting beforehand is essential.
Should a hunter plan to focus on one elevation band or expect mule deer to shift as the season progresses?
Summer range covers 97 percent of the unit, but winter range and a winter concentration layer covering 36 percent of the unit indicate that mule deer consolidate on specific ground as fall advances. Hunters in September can expect dispersed deer across mid-elevations and above, but as October progresses into November and snow falls, a shift toward the concentrated winter grounds should be anticipated. The timing and extent depend on weather and snowfall, which varies year to year.
What is the weather progression through the fall hunting season?
September highs average 67°F with minimal snowfall (0.1 inches monthly), making early archery and muzzleloader hunts warm and dry. October cools to 56°F highs with 2.4 inches of average snowfall, beginning to concentrate deer movement. November drops to 44°F highs with 4.5 inches of snowfall monthly, pushing conditions toward winter terrain and consolidation. Temperatures fall steadily across the season.
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.