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Colorado hunting unit

GMU 581: public land and hunting map

GMU 581 is one of Colorado Parks and Wildlife’s 186 Game Management Units (GMUs) in Colorado. It covers about 688 square miles (440,292 acres), and roughly 44% of it is public land: BLM 22%, Forest Service 12%, state land 8.5%.

Measured Oct 12, 2026 from agency boundaries and USGS PAD-US 4.1 · sources and method

Who manages the land

  • Bureau of Land Management22%
  • U.S. Forest Service12%
  • National Park Service1.5%
  • State land (wildlife, trust and natural-resource agencies)8.5%

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.

Outline of GMU 581 and the units around itGMU 50 · 44% publicGMU 511 · 62% publicGMU 58 · 50% publicGMU 59 · 36% publicGMU 69 · 36% publicGMU 691 · 46% public
GMU 581 in orange; neighbours shaded by public land share (darker = more public). Tap a neighbour to open it.

Units next to GMU 581

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.

SpeciesSeason2026 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 581 is public land?

About 44% of GMU 581 (193,288 of 440,292 acres) is federal or state public land in USGS PAD-US 4.1, mostly Bureau of Land Management, U.S. Forest Service and State land (wildlife, trust and natural-resource agencies). Public land is not always open land: check access and closures before you go.

Who manages the land in GMU 581?

Bureau of Land Management: 22%; U.S. Forest Service: 12%; State land (wildlife, trust and natural-resource agencies): 8.5%; National Park Service: 1.5%. The rest is private, tribal, local government or other land.

Which units border GMU 581?

GMU 50, GMU 511, GMU 58, GMU 59, GMU 69 and GMU 691.

Where are the season dates and rules for GMU 581?

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.