Colorado GMU 131 Elk Hunting
Routt and Rio Blanco counties, northwest Colorado · 193 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 131 is like
Game Management Unit 131 spans 193 square miles across Routt and Rio Blanco counties in the northwest region of Colorado. The terrain is rolling, with some steeper breaks, ranging from 6,500 feet to 9,100 feet in elevation with a typical mid-range around 7,300 feet. About half the unit is gentle terrain, 39% is moderate, and 10% is steep. This is elk country in the transition zone between lower valleys and higher country, and it attracts concentrated hunting pressure each fall.
Approximately 11% of the unit—roughly 21 square miles—is generally open to public hunting on lands managed by the BLM, State Wildlife Areas, and the U.S. Forest Service. Another 5.5% is Colorado State Trust Land, huntable only on parcels enrolled in the Public Access Program; which specific parcels are available is not documented here. Private land comprises 82% of the unit, and about 1.6% is unclassified. Legal access, not terrain walkability, is the binding constraint on where a public-land hunter can operate.
Elk occupy the unit across multiple seasonal ranges. Summer Range covers 100% of the unit, with Summer Concentration at 43%, indicating that elk cluster on roughly two-fifths of the ground rather than spreading uniformly. Winter Range also covers 100%, with Winter Concentration at 35%. The Resident Population layer, which maps year-round use, covers only 16% of the unit, meaning most elk are migratory. As fall advances from September into November and weather cools from highs near 71°F to highs near 43°F, elk shift toward winter range; the timing and extent of that movement vary with snow and conditions.
The unit offers seven seasons in 2026, six open to public drawing: Archery (September 2–30, either-sex); Muzzleloader (September 12–20, either-sex or antlerless); four rifle seasons—1st Rifle (October 14–18, antlerless or bull), 2nd Rifle (October 24–November 1, antlerless), 3rd Rifle (November 7–15, antlerless), and 4th Rifle (November 18–22, antlerless or bull). Archery encompasses Rut Onset and Primary Rut, when bulls are responsive. Muzzleloader overlaps the Primary Rut. The rifle seasons span the Late Rut through Migration Transition periods. A seventh season (September 2–January 31) is private-land-only. The unit draws with overall Easy difficulty—often zero preference points—for the easiest qualifying unit-wide bull or either-sex code available to adult Colorado residents, though other weapons, seasons, and nonresident applicants may require substantially more points. Hunter pressure is Extreme despite the accessibility of the draw.
Terrain & elevation
- Elevation
- 6,500–9,100 ft, typically around 7,300 ft
- Steepness
- Moderate — mean slope 12°
- Slope breakdown
- 51% gentle · 39% moderate · 10% steep · 0% rugged
- Ground you can count on
- ~21 sq mi, plus ~11 sq mi of State Trust Land where access depends on enrollment
Land & access
About 11% of GMU 131 is public land a hunter can count on — BLM, State Wildlife Areas and National Forest. A further 5% is State Trust Land, which is huntable only where CPW has enrolled it.
- BLM9%
- State Wildlife Area1%
- National Forest<1%
- State Trust Land5%
- Unclassified ownership2%
- Private82%
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.
“Ownership unclassified” means the source dataset does not record an owner for that acreage. It is not known to be public or private.
Where elk live in the unit
Colorado Parks & Wildlife maps elk seasonal ranges statewide. This is how much of GMU 131 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%.
- Summer Range100%used in summer
- 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 Range100%used in winter
- Summer Concentration43%where elk bunch up in summer
- Winter Concentration35%where elk bunch up in winter
- Resident Population16%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 | Either-sex, Antlerless |
| 1st Rifle | October 14 – October 18 | Antlerless, Bull |
| 2nd Rifle | October 24 – November 1 | Antlerless |
| 3rd Rifle | November 7 – November 15 | Antlerless |
| 4th Rifle | November 18 – November 22 | Antlerless, Bull |
| Private-land only | September 2 – January 31 | 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 71°F, lows around 39°F (mid-elevation normals)
- October — highs around 57°F, lows around 29°F, about 2.1 in of snow (mid-elevation normals)
- November — highs around 43°F, lows around 19°F, about 10 in of snow (mid-elevation normals)
GMU 131 elk hunting FAQ
How much public ground can a foot-traffic hunter realistically access here?
About 11% of the unit—roughly 21 square miles—is dependably open to public hunting on BLM, State Wildlife Areas, and National Forest land. An additional 5.5% is State Trust Land, but only parcels enrolled in CPW's Public Access Program are huntable, and enrollment varies year to year. Legal access, not terrain, is the limiting factor; even gentle country is off-limits on private ground, which dominates most of the unit.
Is this unit realistic for someone with no preference points?
Yes, for the easiest qualifying unit-wide hunt codes available to adult Colorado residents. The unit draws Easy difficulty, often at zero points. However, that applies only to the lowest preference-point tier; other weapons, seasons (such as the 4th Rifle bull hunt), and nonresident applicants require substantially more points.
When is the elk rut active, and which seasons overlap it?
The rut spans September 1–October 15, with Rut Onset September 1–10 and Primary Rut September 11–30. Archery (September 2–30) captures both phases and is the best opportunity for rut hunting. Muzzleloader (September 12–20) runs during the Primary Rut but covers a narrower window. The rifle seasons begin in the Late Rut / Early Post-Rut period (1st Rifle, October 14–18) and then transition into the post-rut phases.
What happens to elk as the season progresses from September into November?
Summer Range covers 100% of the unit through September, but as fall advances and temperatures cool from ~71°F in September to ~43°F in November, elk shift toward Winter Range, which also covers 100%. Winter Concentration (35% of the unit) marks where elk cluster during the colder months. The pace and extent of that movement depend on snow and weather; exact timing is not predictable.
Is the terrain walkable for a foot hunter?
Yes, the terrain is manageable. Half the unit is gentle, 39% is moderate, and only 10% is steep; no part is rugged. However, walkability and legal access are separate concerns. The rolling nature of the country makes movement feasible, but the vast private-land majority means that finding huntable ground is the real challenge.
How extreme is the hunter pressure here?
Hunter pressure is rated Extreme, despite the Easy draw difficulty. An easy-to-draw unit can still receive heavy hunting traffic, particularly one in the northwest region where access to public land attracts concentrated effort. Archery and Muzzleloader seasons, which overlap the rut, are the most popular periods.
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 28, 2026.