Colorado Half Marathons by Date • By City
Browse all 2019 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.
January 2019
| Sat Jan 12 | All-Out Polar Prowl Half Marathon 10K & 5K | Arvada CO |
| Sun Jan 20 | Prairie Dog Half Marathon 10K & 5K | Louisville CO |
February 2019
| Sun Feb 3 | Ralston Creek Half Marathon | Arvada CO |
| Sun Feb 3 | Super Half Marathon & 5K | Colorado Springs CO |
| Sat Feb 23 | All-Out Mardi Crawl Half Marathon 10K & 5K | Lakewood CO |
| Sun Feb 24 | Pueblo Marathon & Half Marathon | Pueblo CO |
March 2019
| Sat Mar 2 | DreamCatcher Half Marathon | Grand Junction CO |
| Sun Mar 3 | That Dam Run Half Marathon 10K & 5K | Greenwood Village CO |
| Sun Mar 24 | All-Out Spring Fever Half Marathon 10K & 5K | Golden CO |
| Sun Mar 24 | Dust Bowl Series Marathon Half Marathon 10K & 5K – Day 4 | Lamar CO |
| Sun Mar 24 | Spring Equinox Half Marathon | Fort Collins CO |
April 2019
| Sat Apr 6 | Three Creeks Half Marathon | Denver CO |
| Sat Apr 13 | All-Out Beat the Heat Marathon Half Marathon 10K & 5K | Westminster CO |
| Sun Apr 14 | Desert RATS Trail Running Festival Half Marathon | Fruita CO |
| Sun Apr 14 | Horsetooth Half Marathon | Fort Collins CO |
| Sun Apr 14 | Platte River Half Marathon & Relay | Littleton CO |
| Sun Apr 14 | Prairie Dog Half Marathon 10K & 5K | Arvada CO |
| Sat Apr 20 | Hoppin' Half Marathon 10K & 5K | Denver CO |
| Sat Apr 27 | Runs with Scissors Marathon Half Marathon & 50K | Brighton CO |
| Sat Apr 27 | Westminster Trail Half Marathon 10K & 5K | Westminster CO |
May 2019
| Sat May 4 | Grand Valley Marathon Half Marathon 10K & 5K | Palisade CO |
| 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 | Mine Shaft Half Marathon & Tommyknocker Ultras | Golden CO |
| Sun May 19 | Colfax Marathon Half Marathon & Urban 10-Miler | Denver CO |
June 2019
| Sat Jun 1 | Runoff Runoff Marathon Half Marathon & 6K | Creede CO |
| Sun Jun 2 | 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 | South Park Trail Marathon & Half Marathon | Fairplay CO |
| Sat Jun 8 | Steamworks Half Marathon | Durango CO |
| Sun Jun 16 | Estes Park Marathon Half Marathon 10K & 5K | Estes Park CO |
| Sun Jun 16 | Father's Day Half Marathon 10M 10K & 5K | Denver CO |
| Sat Jun 22 | All-Out Summer Breeze Half Marathon 10K & 5K | Arvada CO |
July 2019
| Thu Jul 4 | Longmont Half Marathon & 5K | Longmont CO |
| Sat Jul 13 | Aspen Valley Marathon Half Marathon & 5K | Aspen CO |
| Sat Jul 13 | Sand Creek Half Marathon 10K & 5K | Denver CO |
| Sat Jul 20 | All-Out Dog Days Half Marathon 10K & 5K | Westminster CO |
| Sat Jul 20 | Kickers for Kids Fun Run | Palmer Lake CO |
| Sat Jul 20 | Prairie Dog Half Marathon & 10K | Castle Rock CO |
August 2019
| Sat Aug 10 | Run the Rockies Trail Half Marathon & 10K | Frisco CO |
| Sun Aug 11 | Steamboat Stinger Marathon & Half Marathon | Steamboat Springs CO |
| Sun Aug 18 | Dog Days of Summer Half Marathon 10M 10K 5K & 1M | Denver CO |
| Mon Aug 19 | Mainly Marathons Center of the Nation Series – Day 1 | Sterling CO |
| Sat Aug 24 | All-Out Runapalooza Half Marathon 10K & 5K | Arvada CO |
| Sat Aug 24 | Pikes Peak Ascent Half Marathon | Manitou Springs CO |
| Sat Aug 24 | Thirsty 13 Half Marathon | Durango CO |
| Sun Aug 25 | Erie Half Marathon & 5K | Erie CO |
September 2019
October 2018
| Sat Oct 6 | Castle Rock Trail Festival | Castle Rock CO |
| Sat Oct 6 | Glenwood Canyon Shuffle Half Marathon & 5K | Glenwood Springs CO |
| Sun Oct 7 | Boulder Rez Marathon Half Marathon 3/4 Marathon 10K & Relay | Boulder CO |
| Sun Oct 7 | Louisville Trail Half Marathon 10K & 5K | Louisville CO |
| Sun Oct 7 | Rim to Rim Royal Gorge Half Marathon | Cañon City CO |
| Sun Oct 7 | Xterra Marathon of Trail Races | Colorado Springs CO |
| Sat Oct 20 | Cheyenne Mountain Run Half Marathon | Colorado Springs CO |
| Sun Oct 21 | Rock 'n' Roll Denver Half Marathon & 10K | Denver CO |
| Sun Oct 28 | All-Out Kooky-Spooky Half Marathon 10K & 5K | Golden CO |
| Sun Oct 28 | Westy Half & 5K | Westminster CO |
November 2018
| Sat Nov 3 | Backcountry Wilderness Half Marathon | Highlands Ranch CO |
| Sat Nov 3 | Rim Rock Marathon & Half Marathon | Grand Junction CO |
| Sun Nov 4 | Broomfield Trails Marathon & Half Marathon | Broomfield CO |
| Mon Nov 5 | Southwest Series Marathon Half Marathon 10K & 5K Day 2 – Colorado | Durango CO |
December 2018
| Sun Dec 2 | Rock Canyon Half Marathon | Pueblo CO |
| Sat Dec 8 | All-Out Fa La La Half Marathon 10K & 5K | Westminster CO |
| Sat Dec 8 | Four Corners Quad Keyah Marathon & Half Marathon – Colorado | Four Corners Monument CO |
| Sat Dec 15 | Team USA Indoor Half Marathon | Colorado Springs CO |
