GMU 18: public land and hunting map
GMU 18 is one of Colorado Parks and Wildlife’s 186 Game Management Units (GMUs) in Colorado. It covers about 645 square miles (412,937 acres), and roughly 88% of it is public land: Forest Service 53%, National Park Service 23%, BLM 11%.
- 88%public land
- 645square miles
- 362,146public acres
- 7neighbouring units
Measured Oct 12, 2026 from agency boundaries and USGS PAD-US 4.1 · sources and method
Who manages the land
- Bureau of Land Management11%
- U.S. Forest Service53%
- National Park Service23%
- State land (wildlife, trust and natural-resource agencies)1%
Share of the unit’s area. Federal agencies plus state wildlife, trust and natural-resource land, as the WikiHunt map classifies it. The rest is private, tribal, local or other land.
Rut: Published deer rut timing for Colorado: Mid-Nov – mid-Dec. Rut dates and sources for Colorado.
Units next to GMU 18
Colorado season dates, 2026
Statewide general seasons. Many units have their own dates, quotas or draw-only hunts, so check the unit in the regulations before you go.
| Species | Season | 2026 dates |
|---|---|---|
| Deer | Archery Deer | Sep 2 – Sep 30 |
| Deer | Muzzleloader Deer | Sep 12 – Sep 20 |
| Deer | Combined Rifle Deer | Oct 14 – Nov 22 |
| Elk | Archery Elk | Sep 2 – Sep 30 |
| Elk | Muzzleloader Elk | Sep 12 – Sep 20 |
| Elk | Combined Rifle Elk | Oct 14 – Nov 22 |
| Pronghorn | Rifle Antelope | Oct 3 – Oct 11 |
| Black bear | Fall Bear | Sep 2 – Nov 30 |
Full notes on the Colorado page · Colorado regulations.
Questions
How much of GMU 18 is public land?
About 88% of GMU 18 (362,146 of 412,937 acres) is federal or state public land in USGS PAD-US 4.1, mostly U.S. Forest Service, National Park Service and Bureau of Land Management. Public land is not always open land: check access and closures before you go.
Who manages the land in GMU 18?
U.S. Forest Service: 53%; National Park Service: 23%; Bureau of Land Management: 11%; State land (wildlife, trust and natural-resource agencies): 1%. The rest is private, tribal, local government or other land.
Which units border GMU 18?
GMU 17, GMU 171, GMU 181, GMU 19, GMU 20, GMU 28 and GMU 29.
Where are the season dates and rules for GMU 18?
Colorado Parks and Wildlife sets them. Start at the Colorado hunting regulations. WikiHunt shows the statewide general seasons on the Colorado page and in the app.
Sources and method
- Boundary: Colorado Parks and Wildlife, the same layer the WikiHunt map draws.
- Public land: USGS Protected Areas Database (PAD-US) 4.1, Fee Managers layer (public domain).
- Method: the unit and PAD-US polygons are simplified to about 100 m and measured on a grid of about 250 cells across the unit, so overlapping records are counted once. Expect about ±1 percentage point.
- Season dates: WikiHunt’s season table, updated Sep 2, 2026, checked against each state’s published regulations. Dates change; the regulations win.
- Last updated: Oct 12, 2026. Spotted a mistake? Tell us.