Colorado GMU 18 Elk Hunting
Grand County, northwest Colorado · 646 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 18 is like
Colorado GMU 18 is a 646-square-mile unit in Grand County in the northwest region, spanning elevations from 7,300 feet to 13,500 feet with a typical elevation near 9,400 feet. The terrain is rolling to moderately steep: 29 percent of the unit is gentle, 50 percent moderate, and 18 percent steep, with 2 percent rugged. This combination of elevation and slope creates country suited to both foot travel and glassing, with significant ground accessible to hunters willing to cover distance.
Public land makes up roughly 64 percent of the unit—about 412 square miles—consisting of National Forest, BLM, and State Wildlife Areas. National Park Service land covers roughly 23 percent and is closed to hunting. Private land comprises roughly 12 percent. The dominant owner is the U.S. Forest Service at 53 percent of the unit, followed by National Park Service at 23 percent and BLM at 11 percent. This public-land share provides substantial hunting opportunity, though access and boundaries require verification before each hunt given the interspersed private and closed holdings.
Summer range covers 91 percent of the unit, with summer elk concentrated on roughly 8 percent of the ground. As fall progresses and temperatures drop, elk transition through migration corridors that cover roughly 8 percent of the unit and toward winter range, which covers 29 percent. Winter concentration ground makes up roughly 11 percent of the unit. Hunters should expect to find elk distributed across much of the unit early in the season, with concentration intensifying on seasonal-range ground as conditions drive the fall transition. No mapped resident population exists here, meaning CPW records no year-round use area; elk movement through the unit is substantial across the fall months.
The unit offers eight seasons in total: Archery from September 2 to September 30; Muzzleloader from September 12 to September 20; four numbered rifle seasons (1st Rifle October 14 to October 18, 2nd Rifle October 24 to November 1, 3rd Rifle November 7 to November 15, 4th Rifle November 18 to November 22); and Late Rifle from November 28 to December 6. Archery and Muzzleloader offer either-sex or antlerless tags; the 1st and 4th rifle seasons offer either-sex or antlerless; the 2nd and 3rd rifle seasons are antlerless only. A private-land-only season runs September 1 to January 31. Draw difficulty is easy—the earliest-drawing unit-wide bull or either-sex hunt often comes in at zero preference points for an adult Colorado resident—though hunter pressure on the unit is extreme.
Terrain & elevation
- Elevation
- 7,300–13,500 ft, typically around 9,400 ft
- Steepness
- Steep — mean slope 16.8°
- Slope breakdown
- 29% gentle · 50% moderate · 18% steep · 2% rugged
- Ground you can count on
- ~412 sq mi, plus ~4 sq mi of State Trust Land where access depends on enrollment
Land & access
About 64% of GMU 18 is public land a hunter can count on — National Forest, BLM and State Wildlife Areas. Another 23% is public but closed to hunting — National Park Service.
- National Forest53%
- BLM11%
- State Wildlife Area<1%
- State Trust Land<1%
- National Park Service23%
- Unclassified ownership<1%
- Private12%
Where elk live in the unit
Colorado Parks & Wildlife maps elk seasonal ranges statewide. This is how much of GMU 18 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 Range100%the full extent of range CPW maps for elk — near 100% on most units, and not a statement about when elk are present
- Summer Range91%used in summer
- Winter Range29%used in winter
- Winter Concentration11%where elk bunch up in winter
- Migration Corridors8%movement between ranges, not residence
- Summer Concentration8%where elk bunch up in summer
- Resident Population<1%the only layer that means year-round use
Elk seasons & weapons (2026)
| Season | Dates | Tags offered |
|---|---|---|
| Archery | September 2 – September 30 | Either-sex, Antlerless |
| Muzzleloader | September 12 – September 20 | Either-sex, Antlerless |
| 1st Rifle | October 14 – October 18 | Either-sex, Antlerless |
| 2nd Rifle | October 24 – November 1 | Antlerless |
| 3rd Rifle | November 7 – November 15 | Antlerless |
| 4th Rifle | November 18 – November 22 | Either-sex, Antlerless |
| Late Rifle | November 28 – December 6 | Antlerless |
| Private-land only | September 1 – 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 63°F, lows around 34°F, about 0.3 in of snow (mid-elevation normals)
- October — highs around 51°F, lows around 26°F, about 5.2 in of snow (mid-elevation normals)
- November — highs around 38°F, lows around 16°F, about 15 in of snow (mid-elevation normals)
GMU 18 elk hunting FAQ
Can a hunter with zero preference points draw GMU 18?
Yes. For an adult Colorado resident applying for the easiest unit-wide bull or either-sex hunt code in the primary draw, zero preference points often results in a draw. Other weapons, seasons, and nonresident applicants may require substantially more points. The draw difficulty shown here describes only that easiest qualifying hunt and does not apply to all tags offered.
Is the extreme hunter pressure manageable for someone hunting public land here?
The unit draws extreme pressure, but roughly 64 percent—about 412 square miles—is publicly open to hunting. Hunters willing to move away from established access points and spend time on foot can find less-crowded ground, though the size alone does not guarantee solitude. Success depends more on scouting, timing, and willingness to hike than on the raw public-land share.
Which seasons fall during the peak rut?
Archery runs during Rut Onset (September 2–10) and Primary Rut (September 11–30), with most of the season in peak rut. Muzzleloader (September 12–20) occurs entirely during Primary Rut, making it the season most squarely in the rut window. 1st Rifle (October 14–18) falls in Late Rut and Early Post-Rut, after the peak.
How much of the unit supports winter hunting, and what should a hunter expect in late season?
Winter range covers roughly 29 percent of the unit, and winter concentration makes up roughly 11 percent. Late Rifle (November 28 – December 6) falls in Migration Transition and early Winter Range phenology. Hunters should expect cooling temperatures (highs ~38°F in November) and increasing snowfall (~15 inches average in November) to influence elk distribution and movement, though the exact timing and extent of shifts vary with weather and snow.
What does the steep terrain mean for a hunter on foot?
Half the unit is moderate terrain and 29 percent is gentle, making roughly 450 square miles reasonably walkable. The 18 percent steep and 2 percent rugged sections—about 130 square miles combined—demand more fitness and time. Elevation ranges from 7,300 to 13,500 feet, so hunters should assess their ability to sustain effort at altitude and on variable slopes before committing.
Does GMU 18 have year-round resident elk populations?
No. CPW maps no resident population layer for this unit, meaning no area is recorded as year-round elk use. Elk are present seasonally and move substantially through fall and into winter. Summer range (91% of unit) and winter range (29% of unit) show distinct seasonal occupation, with migration corridors (8% of unit) connecting them.
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.