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.

*BONUS: The REI Cooperative Action Fund is the Charity Partner for this race! That's right - participants have the opportunity to raise awareness and funds to help support nonprofits across the country doing the essential work in making the outdoors more accessible and inclusive for everyone.