Colorado GMU 51 Elk Hunting
Douglas County, central Colorado · 503 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 51 is like
GMU 51 is a 503-square-mile unit in central Colorado's Douglas County foothills, ranging from 5,400 feet to 9,800 feet in elevation with a typical elevation near 6,900 feet. The terrain is rolling to moderately steep: 49 percent of the unit is gentle, 39 percent moderate, and 12 percent steep or rugged. The landscape supports a mix of public and private ground in a region of moderate overall hunter pressure.
Public hunting ground comprises approximately 44 percent of the unit, distributed across roughly 223 square miles of National Forest and State Wildlife Areas. Private land accounts for approximately 45 percent. Approximately 11 percent is unclassified ownership. This distribution means that hunters have access to substantial public ground, though the intermingled private acreage affects the layout of huntable country and route-finding across the unit.
Elk presence in GMU 51 is driven by substantial year-round occupancy: CPW maps Resident Population across 39 percent of the unit, indicating that a large share supports elk through all seasons. Summer Range covers 84 percent, and Winter Range covers 44 percent; the Resident Population ground is not subdivided into these seasonal layers, so the Winter Range figure does not indicate that elk depart the unit. Winter Concentration ground, where elk cluster during the cold months, comprises 6 percent of the unit. Migration Corridors cover 11 percent. This combination means elk are present across much of the unit through fall, with concentrations developing on winter ground as the season advances and snow accumulates at higher elevations.
The unit offers seven seasons in all, of which public applicants can hunt six: Archery (September 2–September 30, either-sex), Muzzleloader (September 12–September 20, antlerless or bull), and four rifle seasons—1st Rifle (October 14–October 18), 2nd Rifle (October 24–November 1), 3rd Rifle (November 7–November 15), and 4th Rifle (November 18–November 22)—all offering antlerless or bull tags. Early seasons fall during the primary rut; later rifle seasons coincide with the post-rut and early migration periods. The unit draws with moderate difficulty, requiring approximately 1–2 preference points for the easiest qualifying unit-wide bull or either-sex hunt code available to adult Colorado residents.
Terrain & elevation
- Elevation
- 5,400–9,800 ft, typically around 6,900 ft
- Steepness
- Moderate — mean slope 12.6°
- Slope breakdown
- 49% gentle · 39% moderate · 12% steep · 1% rugged
- Ground you can count on
- ~223 sq mi, plus ~1 sq mi of State Trust Land where access depends on enrollment
Land & access
About 44% of GMU 51 is public land a hunter can count on — National Forest and State Wildlife Areas.
- National Forest44%
- State Wildlife Area<1%
- State Trust Land<1%
- Unclassified ownership11%
- Private45%
“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 51 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%.
- Overall Range96%the full extent of range CPW maps for elk — near 100% on most units, and not a statement about when elk are present
- Summer Range84%used in summer
- Winter Range44%used in winter
- Resident Population39%the only layer that means year-round use
- Migration Corridors11%movement between ranges, not residence
- Winter Concentration6%where elk bunch up in winter
Elk seasons & weapons (2026)
| Season | Dates | Tags offered |
|---|---|---|
| Archery | September 2 – September 30 | Either-sex |
| Muzzleloader | September 12 – September 20 | Antlerless, Bull |
| 1st Rifle | October 14 – October 18 | Antlerless, Bull |
| 2nd Rifle | October 24 – November 1 | Antlerless, Bull |
| 3rd Rifle | November 7 – November 15 | Antlerless, Bull |
| 4th Rifle | November 18 – November 22 | Antlerless, Bull |
| Private-land only | September 1 – January 31 | 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 76°F, lows around 45°F (mid-elevation normals)
- October — highs around 63°F, lows around 33°F, about 1.7 in of snow (mid-elevation normals)
- November — highs around 52°F, lows around 23°F, about 2.3 in of snow (mid-elevation normals)
GMU 51 elk hunting FAQ
Can a hunter with zero preference points draw an elk tag here?
Yes, but only for the easiest qualifying unit-wide bull or either-sex hunt in the primary draw—the lowest-point tier that drew reliably for adult Colorado residents. The draw difficulty here is moderate (1–2 points), meaning tags exist at the zero-point level, though applicants with preference points have better odds. Other seasons, weapon types, and nonresident applicants require substantially higher point thresholds.
What fraction of the unit can a public-land hunter actually hunt?
Approximately 44 percent of GMU 51—roughly 223 square miles—is generally open to public hunting on National Forest and State Wildlife Areas. The remaining territory is private (45 percent) or unclassified (11 percent). A hunter must plan routes and scouting around private boundaries and check current access conditions before heading in.
Does the draw difficulty here reflect how crowded the unit actually gets?
No. Draw difficulty and hunter pressure are separate measures. GMU 51 has moderate draw difficulty and moderate overall hunter pressure, but an easy-to-draw unit can still see significant foot traffic, especially during rifle seasons. Hunters should expect competition for space and good ground, particularly in the latter rifle seasons.
When is the rut happening during the hunting seasons offered here?
The Archery season (September 2–30) spans the rut onset and primary rut phases, offering the best chance to encounter vocal bulls. The Muzzleloader season (September 12–20) falls entirely within the primary rut. By the 1st Rifle season (October 14–18), the rut has begun to wind down into the late-rut and post-rut recovery phase. The three remaining rifle seasons occur after the primary rut has passed.
Do elk stay in GMU 51 year-round, or do they migrate out as fall progresses?
CPW maps Resident Population—year-round occupancy—across 39 percent of the unit, so a substantial share supports elk throughout the year. This does not mean every elk stays or that none migrate, but rather that significant numbers remain. As the season advances and snow accumulates, expect elk to concentrate on winter range (6 percent of the unit shows winter concentration), but timing and extent vary with weather.
How much cooling should a hunter expect from early September through November?
September highs average around 75°F with little snowfall; by November, highs drop to around 52°F and average snowfall increases to 2.3 inches per month. October sits between these, with highs around 63°F and about 1.7 inches of snowfall. Hunters should plan for a steady cooling trend and the possibility of snow on higher ground by late fall.
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.