Colorado GMU 121 Mule Deer Hunting
Cheyenne, Lincoln and Kiowa counties, southeast Colorado · 1,049 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 121 is like
GMU 121 covers 1,049 square miles across Cheyenne, Lincoln and Kiowa counties in the southeast region of Colorado. The unit is characterized by gentle and rolling terrain, with elevations ranging from 4,200 feet at the low end to a high of 5,100 feet and a typical elevation around 4,500 feet. The landscape across the entire unit is gentle in slope.
Approximately 0.1 percent of the unit, roughly 1 square mile of BLM land, is generally open to public hunting. An additional 4.2 percent, roughly 44 square miles, is Colorado State Trust Land with access dependent on enrollment in CPW's Public Access Program. The remaining 96 percent of the unit is private land. Legal access is the limiting factor for public hunting opportunity here, as less than 1 percent of the unit is reliably open to public hunters.
Mule deer occupy portions of the unit across multiple seasons. The overall mapped range for mule deer covers 100 percent of the unit, representing the full extent of potential range. Winter Range covers 8 percent of the unit, and Winter Concentration, which marks areas where mule deer cluster, encompasses 1 percent. The seasonal distribution of deer through the fall supports hunting activity, though the mapped ranges do not establish uniform deer distribution across the unit.
GMU 121 offers three seasons for mule deer hunters. The Archery season runs from September 2 through September 30 and is either-sex hunting during the Velvet Shed / Early Fall Transition phase. The Muzzleloader season runs from September 12 through September 20, also either-sex, also during the Velvet Shed / Early Fall Transition phase. The Plains Early Rifle season, the unit's single rifle season, runs from October 24 through November 3 for doe or buck hunting during the Early Fall Migration / Nocturnal Buck Phase and Early Pre-Rut / Migration Corridor Staging phases. The draw for this unit is characterized as easy, with the easiest qualifying buck or either-sex code for an adult Colorado resident often drawing at zero preference points in the primary draw, though applicants below that tier sometimes draw as well. Hunter pressure on the unit is moderate overall.
Terrain & elevation
- Elevation
- 4,200–5,100 ft, typically around 4,500 ft
- Steepness
- Gentle — mean slope 1.1°
- Slope breakdown
- 100% gentle · 0% moderate · 0% steep · 0% rugged
- Ground you can count on
- ~1 sq mi, plus ~44 sq mi of State Trust Land where access depends on enrollment
Habitat & cover
What actually grows here, by elevation. Each band adds to 100% on its own — these are shares of that band, not of GMU 121.
Across the unit
- Grass and meadow65%
- Other cover20%
- Sagebrush15%
Cover classes from the USGS National Land Cover Database, split into elevation bands. “Other cover” is the remainder of the classification — bare ground, water, agriculture and developed land — and is left unnamed rather than guessed at.
Land & access
About <1% of GMU 121 is public land a hunter can count on — BLM. A further 4% is State Trust Land, which is huntable only where CPW has enrolled it.
- BLM<1%
- State Trust Land4%
- Private96%
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 121 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 Range8%used in winter
- Winter Concentration<1%where mule deer bunch up in winter
Mule Deer seasons & weapons (2026)
| Season | Dates | Tags offered |
|---|---|---|
| Archery | September 2 – September 30 | Either-sex |
| Muzzleloader | September 12 – September 20 | Doe, Buck |
| Plains Early Rifle | October 24 – November 3 | Doe, 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.
GMU 121 mule deer hunting FAQ
Is there actually public land a hunter can hunt in GMU 121?
Yes, but very little. Roughly 1 square mile of BLM land is generally open to public hunting. An additional 44 square miles of Colorado State Trust Land may be huntable where CPW has enrolled it in the Public Access Program, though enrollment varies by parcel and a hunter must verify which tracts are available. The remaining 96 percent of the unit is private land.
Can a hunter with zero preference points draw a tag here?
Yes. The easiest qualifying buck or either-sex hunt code draws reliably at zero preference points in the primary draw, meaning an applicant with no points has a realistic chance. Applicants enter multiple draw systems; the secondary draw in June is pure random and awards tags with no preference points required, and leftover licences are available first-come, first-served after the primary draw closes.
Which season falls during the mule deer rut?
The Plains Early Rifle season, running October 24 through November 3, overlaps the Early Pre-Rut / Migration Corridor Staging phase as it transitions toward the rut. The Archery and Muzzleloader seasons, both occurring in mid-September, fall during the Velvet Shed / Early Fall Transition phase and precede the rut by several weeks.
What terrain difficulty should a hunter expect?
The terrain is gentle and rolling throughout. Access to public land, however, is the practical limiting factor—fewer than 0.5 percent of the unit is reliably open to public hunting, so a hunter's ability to scout and hunt depends far more on gaining permission or finding enrolled State Trust Land than on navigating steep country.
Is this a realistic unit for a first-time mule deer hunter with no preference points?
Yes, from a draw standpoint. The easiest season draws at zero points reliably, making tag acquisition realistic without points. The terrain is easy to walk. However, legal access is severely constrained—96 percent is private land—so success depends heavily on locating huntable ground through State Trust Land enrollment, private-land access, or the small BLM parcel available.
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
- USGS / MRLC — National Land Cover Database — habitat and cover classes by elevation band
- 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
- USGS PAD-US — Protected Areas Database of the United States — land ownership and access
- Daymet daily climate, 1991–2020 (Oak Ridge National Laboratory) — 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 September 24, 2026.