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Colfax Marathon

May 18 - 19, 2019

Denver, CO

Join Denver’s largest running weekend for 2019! Choose the marathon, half marathon, or urban 10 miler and enjoy Denver’s iconic landmarks. Or create a relay team of five runners for one of the largest marathon relays in the U.S. – your team can be friends or work colleagues as we have Open, Corporate and Government divisions. Just getting started on the running scene? Try out the 5K where we have waves for runners and walkers.