Colorado Half Marathons by Date • By City
Browse all 2022-2023 Colorado half marathons by month below. For each race, you’ll find course maps, elevation profiles, runner reviews, and how to sign up.
When you view a race, you’ll also find contact info if you’re having problems with your registration or need to contact the race directors.
July 2022
Mon Jul 4 | Live Free ROCK-IT Run Half Marathon 5k & 1k | Castle Rock CO |
Mon Jul 4 | Longmont Half Marathon & 5K | Longmont CO |
Sat Jul 16 | Aspen Valley Marathon Half Marathon & 5K | Aspen CO |
Sat Jul 16 | Prairie Dog Half Marathon 10K & 5K | Castle Rock CO |
Sun Jul 17 | Black Hawk Trail Half Marathon | Golden CO |
Sat Jul 23 | All-Out Dog Days Half Marathon 10K & 5K | Westminster CO |
Sat Jul 23 | Living Journeys Half Marathon | Crested Butte CO |
Sat Jul 30 | Mt. Sopris Run Off Half Marathon & 4M | Carbondale CO |
Sat Jul 30 | Rocky Mountain Half Marathon | Estes Park CO |
August 2022
September 2022
October 2022
Sat Oct 1 | Castle Rock Trail Festival 50k Half Marathon 10k & 5k | Castle Rock CO |
Sat Oct 1 | Colorado Springs Marathon Half Marathon & 5K | Colorado Springs CO |
Sun Oct 2 | Long View Marathon & Half Marathon | Fort Collins CO |
Sun Oct 2 | Rim to Rim Royal Gorge Races Half Marathon | Canon City CO |
Mon Oct 3 | Center of the Nation Series – Day 1 Marathon & Half Marathon | Sterling CO |
Sat Oct 8 | Deep Creek Trail Half Marathon | Telluride CO |
Sat Oct 8 | Rough Canyon Trail Runs 50M 50k Half Marathon 10k & 5k | Grand Junction CO |
Sat Oct 8 | The Rad Dirt Fest 50k & Half Marathon | Trinidad CO |
Sun Oct 9 | Adams Half & 5k | Brighton CO |
Sun Oct 9 | Boulderthon Marathon & Half Marathon | Boulder CO |
Sun Oct 9 | Windsor Marathon Half Marathon & Heavy 10K | Windsor CO |
Sat Oct 15 | Mancos Cowboy Half Marathon & 5k | Mancos CO |
Sun Oct 16 | Westy Half & 5k | Westminster CO |
Sun Oct 30 | All-Out Kooky-Spooky Half Marathon 10k 5k & 1M | Golden CO |
November 2022
Sat Nov 5 | Bridge Burner Ultra 50k 30k & Half Marathon | Canon City CO |
Sat Nov 5 | Backcountry Wilderness Half Marathon | Highlands Ranch CO |
Mon Nov 7 | Southwest Series Marathon Half Marathon 10K & 5K – Day 2 | Durango CO |
December 2022
Sat Dec 3 | All-Out Fa La La Half Marathon 10K & 5K | Westminster CO |
Sat Dec 3 | Four Corners Quad Keyah Marathon Half Marathon 5k & 2M | Four Corners Monument CO |
Sun Dec 4 | Rock Canyon Half Marathon | Pueblo CO |
January 2023
Sat Jan 7 | All-Out Polar Prowl Half Marathon 10k & 5k | Arvada CO |
Sun Jan 15 | Arctic Prairie Dog Half – Westminster Half Marathon 10k & 5k | Westminster CO |
February 2023
Sat Feb 4 | All-Out Mardi Crawl Half Marathon 10K & 5K | Arvada CO |
Sun Feb 12 | Super Half Marathon & 5k | Colorado Springs CO |
March 2023
Sat Mar 11 | Run Through Time Marathon Half Marathon & 2M | Salida CO |
Sun Mar 19 | All-Out Spring Fever Half Marathon 10K & 5K | Golden CO |
April 2023
Sun Apr 2 | Platte River Half Marathon & Relay | Littleton CO |
Sat Apr 8 | Runs with Scissors Races 50k Marathon & Half Marathon | Brighton CO |
Sat Apr 15 | All-Out Beat the Heat Marathon Half Marathon 10K & 5K | Westminster CO |
Sun Apr 16 | Horsetooth Half Marathon | Fort Collins CO |
Sun Apr 16 | Spring Fling Prairie Dog Half Marathon 10K & 5K | Arvada CO |
Sun Apr 30 | Blue Heron Half and 5k | Brighton CO |
May 2023
Sun May 7 | Colorado Marathon Half Marathon 10K & 5K | Fort Collins CO |
Sat May 13 | Mine Shaft Half Marathon & Endure 12-Hour & 24-Hour Challenges | Divide CO |
Sat May 20 | Valkyrie Trail Race Marathon Half Marathon 50K & 4-Mile | Colorado Springs CO |
Sun May 21 | Denver Colfax Marathon Half Marathon 10M & Relay | Denver CO |
Sun May 28 | Spirit Trail Run Marathon Half Marathon & 8k | Buena Vista CO |
June 2023
Sat Jun 3 | Revel Rockies Marathon & Half Marathon | Evergreen CO |
Sat Jun 3 | South Park Trail Marathon Half Marathon & Ultra | Fairplay CO |
Sun Jun 4 | Steamboat Marathon Half Marathon & 10K | Steamboat Springs CO |
Sun Jun 18 | Estes Park Marathon & Half Marathon | Estes Park CO |