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May 17-18, 2025
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Colfax Marathon Races
Colfax Marathon Awards Evening
5K on the Runway
Colorado Running Hall of Fame
Colorado Running & Walking Event Alliance
Colfax Races
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Marathon Relay – Overview
> Corporate Marathon Relay
> Government Marathon Relay
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Colfax 5K
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Elite Program – NEW for 2025
2-Day Mile High Challenge
Colfax Double Marathon Challenge
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2025 Ambassador Team
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Run for a Nonprofit
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Run for a Nonprofit
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Colfax Fly Feet Youth Program
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Tips from our Medical Director
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2025 Early Pricing Ends Soon
Race Day is in
This promotion has now ended, but you can still
register here.
Home
All Events
Colfax Marathon Races
Colfax Marathon Awards Evening
5K on the Runway
Colorado Running Hall of Fame
Colorado Running & Walking Event Alliance
Colfax Races
Race Weekend Events
Marathon
Half Marathon
Urban 10 Miler
Marathon Relay – Overview
> Corporate Marathon Relay
> Government Marathon Relay
> Public School Marathon Relay
> Open Marathon Relay
Colfax 5K
Register
Runner Info
Race Weekend Events
Elite Program – NEW for 2025
2-Day Mile High Challenge
Colfax Double Marathon Challenge
5-10-15 Year Loyal Runners
2025 Official Hotels
Athletes with Disabilities
FAQ for 2025
2025 Ambassador Team
Featured Running Clubs
Colfax Store
Run for a Nonprofit
Race Results
Runner Photos
Charities
Run for a Nonprofit
Charity Partners Program
Our Charity Partners
Colfax Fly Feet Youth Program
Schools – Raise or Win Money
Charity Partners Login Library
Training
Training App – Runkeeper Go
Tips from our Medical Director
Featured Running Clubs
Training Programs
Sponsors
Sponsorship
Our Sponsors
Volunteer
About
About Us
Latest News
Privacy Policy
Contact Us
Stay Informed
