3.1Miles
May 17Race Day 2026
5,280′Elevation
3,000+Runners
The Colfax 5K is a fast, flat loop through City Park — Denver's crown jewel. Perfect for first-time racers, families, and speed demons looking to PR at altitude.
Starting at 7:30 AM (after the longer distances), you'll have the energy of thousands of spectators already cheering on marathon runners. The 5K finishes at the same Ferril Lake finish line, giving you the full Colfax experience in 3.1 miles.
Mile-by-Mile Route Breakdown
Altitude Advisory: At 5,280 feet, oxygen levels are about 17% lower than at sea level. Arrive 2–3 days early, increase water intake by 50%, and start conservatively.
Frequently Asked Questions
Last verified September 2026 by the 303Happenings desk. Hours, prices, and access change — confirm current details with the venue.
