Unit research · Colorado GMU 431
GMU 431 — Colorado
76% public across 140,907 ac. Real backcountry here — 63% of the public land sits more than a mile from any road. No landlocked public land.
Computed from primary government data by the open pipeline. See the code →
Tags & season
Tags: check Colorado Parks & Wildlife.
No draw hunts are published for this gmu. Tag type, quotas and season dates are in Colorado Parks & Wildlife's regulations.
Season dates: see Colorado Parks & Wildlife's regulations
Fees and draw dates from Colorado Parks & Wildlife, 2026, verified 2026-08-05 — past its verify-by date, confirm with the agency. Tag type from the agency's published draw statistics: a gmu that appears in none of them has no limited-entry hunt we know of. Source: 2026 Colorado Big Game brochure (rev. 2026-03-18) · CPW primary draw · CPW refunds, reversals and exchanges · Chapter W-2 (2 CCR 406-2), approved 2025-05-07.
Land & access
Backcountry
Where the ground sits
Tap or hover the bars for each elevation band
Slope mix
Which way the slopes face
Share of ground steeper than 5° — flat ground has no facing
North slopes hold shade, cover and snow; south slopes open first.
USGS 3DEP 1 arc-second (30 m), slope at native resolution in a local metric projection, sampled on a 200 m grid. See the code →
Unit intelligence report
52 ac of this gmu has burned — 0% of the unit. The full report assembles it into one printable document and keeps it current as the facts change.
Season conditions — measured, not vibes
Historical temperatures · 2000–2025
Normals for 2000–2025 — tap or hover for a month
Measured at EAGLE CO REGIONAL AIRPORT, 56 km from the unit’s center and ~3,900 ft below its median elevation — expect the unit to run colder. NOAA ISD-Lite hourly observations.
Harvest — agency survey estimates
Elk · 2024
19% success
47 taken by 244 hunters · 1,005 days afield
23 bulls · 24 cows · 0 calves
Season breakdown · 2024
| Season | Success | Harvest | Hunters |
|---|---|---|---|
| 1st rifle | 12% | 5 | 42 |
| 2nd rifle | 32% | 22 | 70 |
| 3rd rifle | 34% | 8 | 23 |
| 4th rifle | 56% | 9 | 16 |
| Archery | 5% | 3 | 71 |
| Muzzleloader | 0% | 0 | 23 |
Which season is the value play here — same ground, different odds.
Deer · 2024
31% success
16 taken by 52 hunters · 153 days afield
14 bucks · 3 does · 0 fawns
Season breakdown · 2024
| Season | Success | Harvest | Hunters |
|---|---|---|---|
| Archery | 0% | 0 | 6 |
| Muzzleloader | 45% | 3 | 6 |
Which season is the value play here — same ground, different odds.
Herd-level estimates · 95% CI
deer · DAU D-13 · 2025: 441 harvested (CI 403–484) · 46% success
elk · DAU E-15 · 2025: 420 harvested (CI 363–486) · 14% success
pronghorn · DAU A-99 · 2025: 6 harvested (CI 3–12) · 21% success
CPW’s stratified-survey estimates for the whole herd unit (DAU) this GMU belongs to — published with the uncertainty the per-GMU tables can’t carry.
CPW estimates harvest, hunters, success and recreation days from its Big Game Harvest Survey. Unit tables run 2019-2024; the 2025 report switched to per-hunt-code tables without unit totals, so unit series end at 2024 and 2025 success rates appear on the draw-odds tables instead. Source: CPW Statewide Harvest Estimates (per species-year PDFs on the species statistics pages).
How these numbers are made
Computed, not curated: no paid research team, no opinions dressed as data. If a number looks wrong, file an issue — the fix ships for everyone.
Ready to scout it?
Everything on this page, live on the map — ownership, boundaries, roads, and your own waypoints.
Take GMU 431 into the field
Download Colorado’s pack and this unit works with no signal — boundaries, ownership, roads, elevation. Record your hunt with the screen off. Check what’s visible from any ridge.
Scan to install OpenHunt for Android. Open this page on the phone afterwards and it lands in the app.
