Colorado Whitetail Rut Dates & Deer Movement

Where do the Colorado rut dates come from?

We found no breeding study and no regional rut dates from Colorado Parks and Wildlife. CPW's whitetail page says only that deer breed from October to December, and a CPW news release from Durango in October 2024 put the deer rut's peak at mid-November through December.

The windows above are our estimate for the plains whitetail, inside CPW's October to December breeding season. CPW's one stated peak, mid-November through December, came in a release from Durango, in southwest Colorado, far from the plains. To fight CWD on the plains, CPW shifted whitetail buck licenses to the early season and mule deer buck licenses to the late seasons, to raise buck harvest in each species' breeding season.

Sources: Colorado Parks and Wildlife, white-tailed deer; Colorado Parks and Wildlife news release, October 4, 2024; Colorado Parks and Wildlife Northeast Region deer herd management plans, 2025 (PDF).

How do the 2026 seasons in Colorado line up with the rut?

Colorado runs separate plains deer seasons east of I-25, and the main 2026 dates are:

• Plains archery: October 1 to December 31, closed during plains rifle seasons
• Plains muzzleloader: October 10 to 18
• Plains rifle: October 24 to November 3
• Late plains rifle: December 1 to 14
• Over-the-counter whitetail rifle (listed units): December 1 to 31
• Rifle west of I-25: October 24 to November 1, November 7 to 15, and November 18 to 22

Every window here falls in plains archery, between the plains rifle season's November 3 close and the late season's December 1 opener. All plains deer licenses are limited, and west of I-25 the third and fourth rifle seasons overlap the windows.

Sources: Colorado Parks and Wildlife 2025-2029 big game season structure (PDF); Colorado Parks and Wildlife Chapter W-2 big game regulations, 2026 (PDF).

How many deer do Colorado hunters take?

CPW estimated about 408,000 deer after the 2025 season, up from about 384,000 a year earlier, and recommended about 5,600 more deer licenses for 2026, though fewer in the Northeast and Southeast.

On the plains, the South Platte River herd averaged about 750 deer a year from 2015 to 2024, about 370 of them bucks, and the Arikaree herd's buck harvest fell to about 160 in 2024, its lowest since 2015.

Sources: Colorado Parks and Wildlife 2026 big game license recommendation summary (PDF); Colorado Parks and Wildlife Northeast Region deer herd management plans, 2025 (PDF).

Where is the public ground in Colorado?

Colorado has more than 23 million acres of public land, but whitetail country is mostly private. Public land covers about 2 percent of the South Platte River herd's range and 1 percent of the Arikaree's, and 89 percent of the Arkansas River herd's range is private. The Pawnee National Grassland, 193,000 acres in GMUs 87 and 88, is the big exception.

CPW's roughly 350 State Wildlife Areas take a hunting or fishing license or an SWA pass to enter, and 973,000 acres of State Trust Land are open through an access program. On the eastern plains, many yellow-signed Walk-In Access properties allow big game from September 1 through December, on foot, with a small game license and habitat stamp.

Sources: Colorado Parks and Wildlife, hunting; Colorado Parks and Wildlife Northeast Region deer herd management plans, 2025 (PDF); Colorado Parks and Wildlife Arkansas River deer herd management plan summary, 2022 draft (PDF); Colorado Parks and Wildlife, State Wildlife Areas; Colorado Parks and Wildlife, State Trust Land finder; Colorado Parks and Wildlife, Walk-In Access program.

Which Colorado rules change a rut hunt?

• Hunters get one deer license a year, or two if one is on a short list that includes over-the-counter either-sex whitetail and antlerless whitetail-only licenses.
• An antlered deer must have at least one antler five inches or longer.
• Northeast season-choice whitetail licenses (units 87 to 90, 93, 95 and 97 to 102) work in every plains season until filled, with each season's weapon.
• Baiting deer, including with salt, minerals or grain, is illegal, and so are electronic calls.
• Crossbows are not legal in the archery deer seasons without a CPW disability accommodation permit.
• Firearm and muzzleloader deer hunters need at least 500 square inches of solid fluorescent orange or pink above the waist and an orange or pink hat; archers on archery licenses are exempt.
• CWD is in 43 of Colorado's 51 deer herds, and 2022 to 2025 testing put it in about 41 percent of adult Arikaree bucks. Deer testing is voluntary in 2026, $25 a deer.
• Cameras that transmit wirelessly cannot be used to find or watch game to hunt it that day or the next, and drone scouting is illegal.

Sources: Colorado Parks and Wildlife Chapter W-2 big game regulations as approved November 13, 2025 (PDF); Colorado Parks and Wildlife Chapter W-2 big game regulations, 2026 (PDF); Colorado Parks and Wildlife 2026 big game license recommendation summary (PDF); Colorado Parks and Wildlife Chapter W-0 general provisions as approved November 13, 2025 (PDF); Colorado Parks and Wildlife Chapter W-0 general provisions as approved January 10, 2024 (PDF); Colorado Parks and Wildlife, hunters with disabilities; Colorado Parks and Wildlife, hunting deer in the field; Colorado Parks and Wildlife CWD report to the Parks and Wildlife Commission, April 2026 (PDF); Colorado Parks and Wildlife, chronic wasting disease.