Denver Colfax Marathon
Race Technical Difficulty Score (RTDS) = 1 Half Marathon / 3 Full Marathon
Join Denver’s largest running weekend for 2020! 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 too!