The Colorado Colfax Marathon is an annual marathon foot-race established in 2006 in Colorado, USA. The course followed Colfax Avenue for 42.195 kilometres (26.219 mi), starting in Aurora, heading west through Denver and finishing in Lakewood. About 6,000 people took part in the inaugural event in 2006. The course changed in 2008 to start and finish in Denver's City Park, with only portions of it on Colfax Avenue. The full marathon heads west to Lakewood and back; the half marathon east to Aurora and back.
In addition to the main event, a half marathon, a relay and a new 5K race also take place.
The 2011 Kaiser Permanente Colfax Marathon, Half Marathon and 5-person Marathon Relay will be held on Sunday, May 15, 2011. Start and finish in Denver’s City Park. In between, the new marathon and relay course hits all the high points: vibrant Colfax, the Capitol, downtown, Cherry Creek Trail and Confluence Park, Invesco - plus eclectic, artsy neighborhoods in Lakewood. Runners love the half-marathon course through Denver and Aurora: flat, fast and shady.
The Colorado Colfax Kids Marathon is a race like the Colorado Colfax Marathon, established in 2006. The run is for Kindergarten to 8th grade students. It is a run that is only 1.2 miles (1.9 km). The students run the other 25.2 miles (40.6 km) in training. The training lasts form February to early May. The race is usually planned to be held in the middle of May. The event is held at the Colorado Mills Mall. The students run through a path in the parking lot around the mall area.