Kick off Denver’s Colfax Marathon weekend in City Park with the Bellco Colfax 5K! Go for a PR in this chip-timed race – separate stroller-friendly start wave for families and walkers with a 1.8 mile shortcut for kids. Run in the Dog Wave and get your dog a race bandana! Your chance to be a part of marathon weekend – at a much shorter distance! The 5K starts in City Park and weaves its way around the park finishing in the same place as the Marathon.