Colorado Half Marathons by Date
Browse all Colorado Half Marathon 2024 by month and by city below.
For each race, you’ll find the history of the half marathon and the course, the most recent year’s course maps, elevation profiles, runner reviews, pricing, and how to sign up. When you view a race, you might also find contact info if you’re having problems with your registration or need to contact the race directors.
We dedicated dozens of hours every month searching for races to include in the Colorado Half Marathons calendar.
If you happen to see any half marathon not included, contact us at info@halfmarathons.net to submit your race.
Check beneath the Colorado half marathon calendar for answers to frequently asked questions.
Upcoming 2024 Colorado Half Marathons
March 2024
Sat Mar 2 | Time to Paddy 5k 10k & Lucky 13.1 | Colorado Springs CO |
Sun Mar 3 | That Dam Run Half Marathon 10k & 5k | Greenwood Village CO |
Sun Mar 3 | Time to Paddy 5k 10k & Lucky 13.1 | Denver CO |
Sat Mar 9 | Run Through Time Marathon Half Marathon & 2M | Salida CO |
Sun Mar 17 | All-Out Spring Fever Half Marathon 10K & 5K | Golden CO |
Sun Mar 24 | Spring Equinox Half Marathon & 4M | Fort Collins CO |
April 2024
Sun Apr 7 | Three Creeks Half Marathon | Denver CO |
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Sat Apr 13 | All-Out Beat the Heat Marathon Half Marathon 10K & 5K | Westminster CO |
Sat Apr 13 | Boulder Rez Half 10k & 5k | Boulder CO |
Sun Apr 14 | Desert RATS Trail Running Festival Half Marathon & 10k | Fruita CO |
Sun Apr 14 | Horsetooth Half Marathon | Fort Collins CO |
Sun Apr 14 | Platte River Half Marathon & Relay | Littleton CO |
Sun Apr 14 | Spring Fling Prairie Dog Half Marathon 10K & 5K | Arvada CO |
Sat Apr 20 | Time Travel Half Marathon 10k & 5k | Westminster CO |
Sun Apr 21 | Time Travel Half Marathon 10k & 5k | Colorado Springs CO |
Sat Apr 27 | NOCO Half Marathon & 10k | Loveland CO |
Sat Apr 27 | Runs with Scissors Races 50k Marathon & Half Marathon | Brighton CO |
May 2024
Sun May 5 | Colorado Marathon Half Marathon 10K & 5K | Fort Collins CO |
Sat May 11 | Carbon Valley Half Marathon & 5k | Firestone CO |
Sat May 11 | Valkyrie Trail Race Half Marathon | Colorado Springs CO |
Sat May 11 | Vallecito Lake Heavy Half | Bayfield CO |
Sun May 12 | Fruita Trail Half | Fruita CO |
Sat May 18 | Mine Shaft Half Marathon & Endure 12-Hour & 24-Hour Challenges | Divide CO |
Sun May 19 | Denver Colfax Marathon Half Marathon 10M & Relay | Denver CO |
Sun May 19 | Ram Party Marathon Half Marathon 9M & 5k | Colorado Springs CO |
Sun May 26 | Spirit Trail Run Marathon Half Marathon & 8k | Buena Vista CO |
June 2024
Sat Jun 1 | Mountain Ridge Trail Race 22M Half Marathon & 10k | Highlands Ranch CO |
Sat Jun 1 | Revel Rockies Marathon & Half Marathon | Evergreen CO |
Sun Jun 2 | Colorado 13er Half Marathon 10k & 5k | Louisville CO |
Sun Jun 2 | Steamboat Marathon Half Marathon & 10K | Steamboat Springs CO |
Sat Jun 8 | All-Out Summer Breeze Half Marathon 10k 5k & 1M | Arvada CO |
Sun Jun 16 | Estes Park Marathon & Half Marathon | Estes Park CO |
Sat Jun 22 | Slacker Half Marathon & 4-Mile | Georgetown CO |
July 2024
Thu Jul 4 | July 4th ROCK-IT Run Half Marathon & 5k | Castle Rock CO |
Thu Jul 4 | Longmont Half Marathon & 5K | Longmont CO |
Sat Jul 13 | All-Out Dog Days Half Marathon 10K & 5K | Westminster CO |
Sat Jul 13 | Aspen Valley Marathon Half Marathon & 5k | Aspen CO |
Sat Jul 20 | Prairie Dog Half Marathon 10K & 5K | Castle Rock CO |
August 2024
Sat Aug 3 | All-Out Runapalooza Half Marathon 10K & 5K | Arvada CO |
Sat Aug 3 | Boulder Rez Marathon & Half Marathon | Boulder CO |
Sat Aug 3 | Rocky Mountain Half Marathon | Estes Park CO |
Sun Aug 4 | Emerald Mountain Epic Marathon & Half Marathon | Steamboat Springs CO |
Sat Aug 10 | Georgetown to Idaho Springs Half Marathon | Georgetown CO |
Sat Aug 17 | Mount Sneffels Marathon & Half Marathon | Ouray CO |
Sun Aug 18 | Erie Half & 5k | Erie CO |
Sat Aug 24 | Byers Peak Stampede Half Marathon & 5k | Winter Park CO |
Sat Aug 24 | Hometown Half Marathon 10k & 5k | Colorado Springs CO |
Sat Aug 24 | Staunton Rocks! Marathon & Half | Pine CO |
Sat Aug 24 | Thirsty 13 Half Marathon | Durango CO |
Sat Aug 24 | Westminster Trail Race Half Marathon 10k & 5k | Westminster CO |
Sun Aug 25 | Hometown Half Marathon 10k & 5k – Denver | Westminster CO |
September 2024
October 2024
Sat Oct 5 | Castle Rock Trail Festival 50k Half Marathon 10k & 5k | Castle Rock CO |
Sat Oct 5 | Rim to Rim Royal Gorge Races Half Marathon | Canon City CO |
Sat Oct 5 | Spooky Sprint – Denver Half Marathon 10k & 5k | Westminster CO |
Sun Oct 6 | Spooky Sprint – Colorado Springs Half Marathon 10k & 5k | Colorado Springs CO |
Sun Oct 6 | Windsor Marathon Half Marathon 10k & 5k | Windsor CO |
Sat Oct 12 | Long View Marathon & Half Marathon | Fort Collins CO |
Sun Oct 13 | Westy Half & 5k | Westminster CO |
Sun Oct 27 | All-Out Kooky-Spooky Half Marathon 10k 5k & 1M | Golden CO |
TBD Oct 2024 | Colorado Brewery Running Series – New Belgium Brewing Half Marathon | Fort Collins CO |
TBD Oct 2024 | Breckenridge Road Marathon Half Marathon & 10k | Breckenridge CO |
TBD Oct 2024 | Mancos Cowboy Half Marathon & 5k | Mancos CO |
TBD Oct 2024 | Latino Ultra Nature Adventure Half Marathon | Boulder CO |
November 2024
Sat Nov 2 | HRCA Backcountry Wilderness Half Marathon | Highland Ranch CO |
Mon Nov 6 | Southwest Series Day 2 Marathon Half Marathon & 5k | Durango CO |
TBD Nov 2024 | Bridge Burner Ultra 50k 30k & Half Marathon | Canon City CO |
TBD Nov 2024 | Rim Rock Run Marathon & Half Marathon | Fruita CO |
December 2024
TBD Dec 2024 | All-Out Fa La La Half Marathon 10K & 5K | Westminster CO |
TBD Dec 2024 | Colorado Cold Rush 50k & Half Marathon | Colorado Springs CO |
TBD Dec 2024 | Rock Canyon Half Marathon | Pueblo CO |
TBD Dec 2024 | Four Corners Quad Keyah Marathon Half Marathon & 5k | Four Corners Monument CO |
January 2025
TBD Jan | All-Out Polar Prowl Half Marathon 10k & 5k | Arvada CO |
TBD Jan | Arctic Prairie Dog Half – Westminster Half Marathon 10k & 5k | Westminster CO |
February 2025
TBD Feb | All-Out Mardi Crawl Half Marathon 10K & 5K | Arvada CO |
TBD Feb | Super Half Marathon and Game Day 5k | Colorado Springs CO |
TBD Feb | Ralston Creek Half Marathon & 5k | Arvada CO |
TBD Feb | Stories Ultra 6H Half Marathon & 10k | Colorado Springs CO |
Frequently Asked Questions About Colorado Half Marathons
What are the most popular Colorado half marathons?
The four most popular Colorado half marathons are the Denver Colfax Half Marathon, the REVEL Rockies Half Marathon, the Horsetooth Half Marathon, and Boulderthon.
What’s the best half marathons in Colorado for beginners in 2024?
We have three picks for the best beginner Colorado half marathons. The first is the Slacker Half Marathon for it’s fun fast downhill course. Secondly, Boulderthon, for it’s scenic course, huge crowds, and amazing production quality. And finally, the Denver Colfax Half Marathon for it’s notable and exciting course and race experience.
What’s the best month to run a half marathon in Colorado?
September and October are the most popular months to run Colorado half marathons.
What are the most popular cities to run Colorado half marathons?
Colorado Springs, Boulder, and Denver are the most popular cities to run a Colorado half marathon in.