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Jefferson Center - Denver Colfax Marathon
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May 16-17, 2026
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Jefferson Center
Home
All Events
Colfax Marathon Races
Colfax Marathon Awards Evening
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
2-Day Mile High Challenge
Colfax Double Marathon Challenge
5-10-15 Year Loyal Runners
Athletes with Disabilities
2026 Official Hotels
FAQ for 2026
Colfax Store
Ambassador Team
Featured Running Clubs
Race Results
Denver – Plan Your Trip!
Run for a Nonprofit
Charities
Our Charity Partners
Run for a Nonprofit
Charity Partners Program
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
