Colorado GMU 161 Pronghorn Hunting
Jackson County, northwest Colorado · 408 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 161 is like
GMU 161 spans 408 square miles in Jackson County in the northwest region and offers rolling terrain with some steeper breaks. Elevation ranges from 7,800 feet to 12,200 feet, with typical ground sitting near 8,600 feet. The terrain is predominantly gentle to moderate, with 66% gentle slopes and 28% moderate slopes; steep and rugged areas comprise only 6% of the unit combined.
The unit is roughly 68% open to public hunting on National Forest, BLM, and State Wildlife Areas. An additional 4.8% is Colorado State Trust Land where access depends on enrollment in CPW's Public Access Program. Private ground accounts for 27% of the unit. Hunters planning to access the public ground should verify current road and trailhead conditions, as seasonal closures and private inholdings can affect on-the-ground entry even where land is publicly owned.
CPW maps pronghorn range across 48% of the unit as Overall Range, with 25% covered by Winter Range and 17% by Winter Concentration areas. Migration Corridors occupy 9% of the unit. The Winter Concentration layer indicates that pronghorn cluster on specific ground as the season progresses into fall and winter, rather than dispersing evenly across the broader range.
The unit offers four seasons for pronghorn: Archery August 15–September 20 (Doe/Buck); Muzzleloader September 21–September 29 (Doe/Buck); Rifle October 3–October 11 (Doe/Buck); and 2nd Rifle October 17–October 25 (Doe). Archery falls during the Pre-Rut and Primary Rut phases, while Muzzleloader spans the Primary Rut and Late Rut phases. Rifle hunts occur in the Late Rut and Fall Grouping phases. September temperatures average highs around 64°F and lows near 38°F with minimal snowfall, while October cools to highs around 51°F and lows near 28°F with average monthly snowfall of 4.7 inches. Overall draw difficulty for the easiest unit-wide buck or either-sex code is very hard, requiring 6–9 preference points. Hunter pressure on the unit is low.
Terrain & elevation
- Elevation
- 7,800–12,200 ft, typically around 8,600 ft
- Steepness
- Gentle — mean slope 8.8°
- Slope breakdown
- 66% gentle · 28% moderate · 5% steep · 1% rugged
- Ground you can count on
- ~279 sq mi, plus ~19 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 161.
Lower elevations
- Sagebrush72%
- Riparian15%
- Other cover10%
- Grass and meadow2%
Mid elevations
- Sagebrush37%
- Conifer29%
- Grass and meadow18%
- Riparian11%
- Aspen4%
Higher elevations
- Conifer61%
- Grass and meadow21%
- Sagebrush12%
- Other cover2%
- Riparian2%
- Aspen2%
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 68% of GMU 161 is public land a hunter can count on — National Forest, BLM and State Wildlife Areas. A further 5% is State Trust Land, which is huntable only where CPW has enrolled it.
- National Forest40%
- BLM26%
- State Wildlife Area2%
- State Trust Land5%
- Unclassified ownership<1%
- Private27%
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 pronghorn live in the unit
Colorado Parks & Wildlife maps pronghorn seasonal ranges statewide. This is how much of GMU 161 each range covers — the single best clue to whether pronghorn are here in September, in November, or only passing through. The layers overlap, so they do not add to 100%.
- Overall Range48%the full extent of range CPW maps for pronghorn — near 100% on most units, and not a statement about when pronghorn are present
- Winter Range25%used in winter
- Winter Concentration17%where pronghorn bunch up in winter
- Migration Corridors9%movement between ranges, not residence
Pronghorn seasons & weapons (2026)
| Season | Dates | Tags offered |
|---|---|---|
| Archery | August 15 – September 20 | Doe, Buck |
| Muzzleloader | September 21 – September 29 | Doe, Buck |
| 2nd Rifle | October 17 – October 25 | Doe |
| Rifle | October 3 – October 11 | 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.
Fall weather
- September — highs around 64°F, lows around 38°F, about 0.2 in of snow (mid-elevation normals)
- October — highs around 51°F, lows around 28°F, about 4.7 in of snow (mid-elevation normals)
- November — highs around 38°F, lows around 19°F, about 23.2 in of snow (mid-elevation normals)
GMU 161 pronghorn hunting FAQ
How much ground can a public-land hunter actually hunt in GMU 161?
Roughly 68% of the unit, or about 279 square miles, is generally open to public hunting on National Forest, BLM, and State Wildlife Areas. An additional 4.8% is State Trust Land, but access there depends on enrollment in CPW's Public Access Program, so only parcels CPW has enrolled may be hunted. The remaining 27% is private.
Is GMU 161 realistic for a hunter with no preference points?
The easiest unit-wide buck or either-sex code available to adult residents requires 6–9 preference points in the primary draw, making zero-point applicants unlikely to draw through that route. However, the Secondary Draw (held in June and open to all applicants regardless of points) and the Leftover List (first-come, first-served after the primary draw) remain alternative pathways to a tag.
Do pronghorn shift toward winter concentration areas later in the fall?
Winter Concentration covers 17% of the unit and marks ground where pronghorn cluster as the season advances. Migration Corridors occupy 9% of the unit, indicating movement into winter range as conditions change. Hunters should expect pronghorn to shift toward these concentrated areas as temperatures drop and snow increases through October and November.
Which season is better for early-season hunting, and what weather should a hunter expect?
Archery runs August 15–September 20 and falls during the Pre-Rut and Primary Rut phases, with September highs averaging around 64°F. Muzzleloader follows September 21–September 29 and spans the Primary Rut and Late Rut phases. By early October, temperatures drop sharply to highs around 51°F, and significant snowfall begins, averaging 4.7 inches in October.
What terrain should a foot-hunting pronghorn hunter expect?
The unit is rolling with some steeper breaks, dominated by gentle (66%) and moderate (28%) slopes. Only 6% of the unit is steep or rugged, so most of the accessible public ground is walkable for hunters on foot without extreme elevation gain or technical terrain challenges.
How does draw difficulty compare to hunter pressure in this unit?
Draw difficulty is very hard, requiring 6–9 points for the easiest bull or either-sex code. However, hunter pressure on the unit is low, meaning that applicants who do draw a tag will encounter fewer hunters in the field than the draw difficulty alone might suggest.
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 — Pronghorn 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) — pronghorn 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.