Denver's Colfax Marathon

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City Park
Denver, CO 80218 DenverRate and review
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Now in its 13th year, the Colfax Marathon Partnership is a nonprofit 501c3 with the mission of producing the premier marathon weekend in the Mountain West Region, committed to community, philanthropy, and fun. Originally created by the cities of Denver, Lakewood, and Aurora to recognize Colfax Avenue, the longest main street in America; it's Denver's only marathon. The race has grown to be a nationally recognized event featuring unique courses incorporating the iconic landmarks of the Mile-High City.

The Kaiser Permanente Colfax Marathon weekend is the largest marathon weekend in the Rocky Mountains, with over 19,000 runners in 2017. Races include a marathon, half marathon, urban 10 miler, and a 5K. In addition, the marathon relay has over 1,250 teams in Corporate, Government or Open divisions and is the second largest Marathon Relay in the US.

As Denver's largest running event, the Colfax Marathon includes seven races over two days and a two-day Health & Fitness Expo at Mile High Stadium. Runner's World has selected Colfax Marathon in its top 10 lists in multiple years!

Each year, the Colfax Marathon is held the third Sunday in May, with the Expo and races making a fun three day weekend.

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