Colorado Race Calendar

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

Mon Sep 5 Labor Day Half Marathon Parker CO
Sat Sep 10 Black Squirrel Half Marathon Fort Collins CO
Sat Sep 10 Ned Ned Run Half Marathon 10k & 5k Nederland CO
Sat Sep 10 Winter Park Half Marathon Winter Park CO
Sat Sep 17 Red Feather Trail Jamboree 50k & Half Marathon Red Feather Lakes CO
Sat Sep 17 All-Out Fall Fest Marathon Half Marathon 10K & 5K Westminster CO
Sat Sep 17 Autumn Color Run Half Marathon 10k 5k & 1M Buena Vista CO
Sat Sep 17 Beulah Challenge Half Marathon 10k & 5k Beulah CO
Sat Sep 17 Golden Leaf Half Marathon Aspen CO
Sat Sep 17 Mountain Rats Marathon Half Marathon & 55K Eagle CO
Sat Sep 17 Pikes Peak Ascent Half Marathon Manitou Springs CO
Sat Sep 17 Red Feather Trail Jamboree 50k & Half Marathon Red Feather Lakes CO
Sat Sep 17 Run the Rockies Half Marathon & 10k Frisco CO
Sat Sep 17 Snow Mountain Ranch Trail Running Festival Granby CO
Sun Sep 18 Fall Equinox Marathon Half Marathon & 5M Fort Collins CO
Sun Sep 18 Nun Run Half Marathon 5k & 1M Littleton CO
Sun Sep 18 Spanish Peaks Half Marathon 2M & Relay La Veta CO
Sat Sep 24 Pioneer Prairie Dog Half Marathon 10K & 5K Westminster CO
Sun Sep 25 Bear Chase Race Half Marathon & 10k Lakewood CO
Sun Sep 25 Sunlight Showdown Half Marathon Glenwood Springs CO

October 2022

November 2022

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

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

April 2023

May 2023

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