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Colorado hunting unit

GMU 591: public land and hunting map

GMU 591 is one of Colorado Parks and Wildlife’s 186 Game Management Units (GMUs) in Colorado. It covers about 215 square miles (137,687 acres), and roughly 100% of it is public land: Dept. of Defense 100%.

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

Who manages the land

  • Department of Defense100%

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.

Military land: 100% of this unit is Department of Defense land, which is usually closed to the public or open only with a base permit. Check with the installation before planning a hunt.

Rut: Published deer rut timing for Colorado: Mid-Nov – mid-Dec. Rut dates and sources for Colorado.

Outline of GMU 591 and the units around itGMU 118 · 33% publicGMU 59 · 36% public
GMU 591 in orange; neighbours shaded by public land share (darker = more public). Tap a neighbour to open it.

Units next to GMU 591

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 591 is public land?

About 100% of GMU 591 (137,274 of 137,687 acres) is federal or state public land in USGS PAD-US 4.1, mostly Department of Defense. Public land is not always open land: check access and closures before you go.

Who manages the land in GMU 591?

Department of Defense: 100%. The rest is private, tribal, local government or other land.

Which units border GMU 591?

GMU 118 and GMU 59.

Where are the season dates and rules for GMU 591?

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.