September brings a familiar change to the San Luis Valley.

Along with cooler mornings, changing aspens and the first hints of fall, hunters begin heading into the mountains surrounding the Valley. Colorado's 2026 elk archery season opens Wednesday, September 2, marking the beginning of another busy fall hunting season.

For hunters, it is a date that has been circled on the calendar for months. For everyone else who enjoys the mountains, it is also a reminder that the backcountry is about to become considerably busier.

Elk Country Surrounds the Valley

The San Luis Valley sits between some remarkable elk country.

To the west are the San Juan Mountains and Rio Grande National Forest, while the Sangre de Cristo Mountains rise along the eastern side of the Valley. Public lands throughout the region provide extensive habitat for elk as well as hunting opportunities.

Colorado Parks and Wildlife manages the Valley through several Game Management Units, or GMUs, and hunters need to know the regulations for the particular unit and hunt code listed on their license.

One important local herd is CPW's E-32 elk herd, which includes GMUs 80 and 81 in the southwestern San Luis Valley. The approximately 2,100-square-mile herd area includes portions of Alamosa, Rio Grande, Conejos, Mineral and Archuleta counties.

CPW reported earlier this year that this elk herd has generally been increasing since reaching a low point during the mid-2010s.

September Means Archery — and the Elk Rut

Part of what makes September elk hunting so special is its timing.

The archery season coincides with the period when elk move toward their annual rut. Bulls become increasingly vocal, and the unmistakable sound of an elk bugle can carry a remarkable distance through the mountains on a cool September morning.

Archery hunters often use calls to imitate elk and attempt to bring a bull within bow range — a very different kind of hunt from the rifle seasons that arrive later in the fall.

Colorado's general 2026 archery elk season runs September 2 through September 30, although hunters should always check the dates and hunt code printed on their individual license.

A Major Change for Nonresident Hunters

Hunters coming to Colorado from other states will encounter an important change in 2026.

Instead, Colorado created limited nonresident archery elk hunt codes for those units, with licenses allocated through the draw.

Colorado Parks and Wildlife says the change was made in response to crowding concerns in western Colorado's over-the-counter archery units and allows wildlife managers greater control over the number and distribution of nonresident archery hunters.

Because the San Luis Valley lies west of I-25, this is particularly relevant to hunters who traditionally traveled here from outside Colorado.

Resident hunters continue to have over-the-counter archery opportunities in qualifying units, but everyone should verify the regulations for the specific GMU they intend to hunt.

Archery Hunters Won't Have the Mountains to Themselves

Hunting season doesn't mean public lands are closed to everyone else.

Hikers, campers, anglers, photographers, horseback riders, ATV riders and others will continue enjoying the mountains throughout September.

That makes awareness important.

People recreating in hunting country may want to wear a brightly colored outer layer or hat to make themselves easier to see. Dog owners should also consider putting a brightly colored vest or other highly visible gear on their dogs when traveling in areas where hunting is taking place.

Hunters, meanwhile, should remember that they are sharing public lands with other recreationists.

A little courtesy from everyone goes a long way.

Muzzleloader Hunters Join the Season Next

September becomes even busier when Colorado's muzzleloader season opens September 12 and continues through September 20.

That means muzzleloader hunters and archery hunters will be in the field at the same time for nine days.

After September comes the series of Colorado rifle seasons, bringing another wave of hunters into the Valley and surrounding mountains.

Hunting Season Matters to Valley Communities

The effects of hunting season aren't limited to the mountains.

Each fall, hunters traveling into the San Luis Valley stop for gasoline, groceries, ice, meals, lodging and hunting supplies. Some stay for several days or longer.

For restaurants, motels, sporting-goods businesses, convenience stores and other businesses in communities throughout the Valley, hunting season can provide an important fall boost.

It's one more reason hunting remains part of the seasonal rhythm of life in the San Luis Valley.

Know Before You Go

Colorado Parks and Wildlife recommends that hunters carefully review the 2026 Colorado Big Game Hunting Brochure before heading into the field.

Regulations can vary considerably by GMU, species, season and license type. Hunters should verify their hunt code, season dates, legal method of take and any unit-specific restrictions rather than relying on what applied in previous years.

Hunters should also check current Forest Service or Bureau of Land Management information for road closures, fire restrictions and other public-land conditions before heading into the backcountry.

Another regulation worth remembering is that many San Luis Valley-area GMUs have antler-point restrictions for bull elk. Depending on the unit, a legal bull may need four points or more on one antler or a brow tine at least five inches long. Hunters should check the regulations for their particular GMU before taking a shot.

The Beginning of a Valley Tradition

For some people, September in the San Luis Valley means potatoes coming out of the fields.

For others, it means the first yellow leaves appearing high in the mountains.

And for hunters, September means elk.

Beginning September 2, camouflage-clad hunters carrying bows will once again head up forest roads and trails before daylight, hoping to hear a distant bugle echo through the timber.

Whether you hunt or simply enjoy exploring the mountains, it's a sure sign that another San Luis Valley fall is almost here.