May 17-18, 2025
Join Denver’s largest running weekend. Choose the marathon, half marathon, urban 10 miler, marathon relay on Sunday or the 5K on Saturday. Pick a race on Sunday and add the 5K and you have Mile High Two Day Challenge.
 |
 |
 |
 |
 |
ASICS Colfax Half-Zips
Included with Premium events or available for purchase
 |  |  |  |  |
Contact Information
HELLO! THANKS FOR STOPPING BY. WE’LL TRY TO CONNECT YOU TO THE RIGHT PERSON
- The best way to reach us is to email info@runcolfax.org
- If you’re interested in being a sponsor, email Melissa@runcolfax.org
- If you want to learn more about our Charity Partners Program, email charitypartner@runcolfax.org
- You can also find us on Facebook and Twitter @runcolfax
- To purchase multiple registration codes for your employees, charity runners, or large group, email multiplereg@runcolfax.org
Purchase multiple registration codes
Are you looking to purchase multiple registration codes for your employees, charity runners, or large groups?
Send us an email at multiplereg@runcolfax.org
Contact information
- Event contact
- Team Colfax
- info@runcolfax.org
- Website
- Visit website
