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May 18-19, 2019
| Denver, CO
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Urban 10 Miler
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Colfax 5K
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Colfax Double Marathon Challenge
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Two days. Seven races.
Which one will you run?
Be a part of Marathon Weekend in 2019. May 17, 18 & 19, 2019
Friday, May 17
Health & Fitness Expo
Saturday, May 18
Colfax 5K
Health & Fitness Expo
Sunday, May 19
Marathon
Half Marathon
Urban 10 Miler
Marathon Relay
Open Relay
Corporate Cup Relay
Government Cup Relay
Register
Home
Races
Marathon
Half Marathon
Urban 10 Miler
Marathon Relay
Corporate Relay
Government Relay
Colfax 5K
Race Weekend Events
Register
Race Results
Training
Group Training Runs
Training Programs
Featured Running Clubs
Training Tips
Kaiser Permanente Training Tips
A Year in Running
Runner Info
Colfax Store
Race Pricing
5-10 Year Legacy Runners
2 Day Mile High Challenge
Colfax Double Marathon Challenge
FAQ
Official Hotels
Race Results
Elite Program
Ambassador Team
Highlights from Previous Years
Athletes with Disabilities
Run for a Nonprofit
Colorado Running Hall of Fame
Charities
Run for a Nonprofit
Charity Partners Program
Our Charity Partners
Schools – Raise or Win Money
Charity Partners Login Library
Companies
How To Get Your Company Involved
Sponsorship
Our Sponsors
Volunteer
About
About Us
Latest News
In the Press
Contact Us
Stay Informed