Colorado Muzzleloader Hunting Season – muzzleloading rifles and smoothbore muskets, provided the minimum caliber shall be forty (.40) for all big game except elk and moose. The minimum caliber for elk and moose shall be fifty (.50). All muzzle-loading rifles and smoothbore muskets from forty (.40) caliber through fifty (.50) caliber must use a bullet of at least 170 grains in weight. All muzzle-loading rifles and smoothbore muskets greater than fifty (.50) caliber must use bullets of at least 210 grains in weight. 

a. During the muzzle-loading firearms seasons for deer, elk, pronghorn, bear, and moose only lawful muzzle-loaders and smoothbore muskets may be used by muzzle-loading license holders. 
b. During the muzzle-loading firearm seasons for deer, elk, pronghorn, bear, and moose the following additional restrictions apply: 
1.Propellent/Powders: The use of pelletized powder systems and smokeless powder are prohibited. 
2. Projectiles: Sabots are prohibited. For the purposes of this regulation cloth patches are not sabots. 
3. Loading: Firearms must load from the muzzle. Firearms, which can be loaded from the breech, are prohibited. 
4. Sights: Any muzzle-loading rifle or smoothbore musket with any sighting device other than open or “iron sights is prohibited. 
5. Electronic or battery-powered devices cannot be incorporated into or attached to the muzzle-loading firearm.

Colorado Muzzleloader Hunting Season

General Muzzleloader Season:

Muzzleloader (by draw only)​​

​​​​Deer/elk/moose​Sept. 9–17​

Plains deer (east of I-25, except Unit 140)​

Oct. 14–22​Pronghorn​Sept. 21–29

Please visit this link for more information.

Colorado Muzzleloader Hunting Season


An interactive version of the Big Game Regulations brochure, including bear, deer, elk and pronghorn, is available. Features include videos, publication search, links and magnification options for easy reading.
There is also a PDF version (10MB) available for your convenience.
The Colorado Big Game Hunting Planner is an easy-to-read two-page summary of season dates, fees, and application dates and deadlines.
It can be saved and printed for easy reference as you plan your hunt during the Colorado Muzzleloader Hunting Season.

See the Plan Your Hunt page for useful information on organizing and planning your hunt, buying licenses and more!

Colorado Muzzleloader Hunting Season

General Muzzleloader Seasons:

Deer/elk/moose Sept. 10–18
Plains deer (east of I-25, except Unit 140)  Oct. 8–16
Pronghorn Sept. 21–29

This information is subject to change, for more information visit: http://wildlife.state.co.us/

Have Colorado Muzzleloader Hunting Season Questions?

Muzzleloader Hunting season is the best time to shoot the biggest deer before they are spooked by the regular gun season. If you are new to muzzleloaders or would like more information on your states muzzleloader hunting regulations make sure to give us a call. Knight Rifles is focused on promoting black powder hunting in all states across the USA and can help you determine when your particular states hunting season starts. If you have questions about Colorado Muzzleloader Hunting Season, please call us at 1-866-518-4181 or email us at sales@knightrifles.com.

Knight Rifles, America’s Muzzleloader!

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