When
May 17, 2026
Starts at 6:00am MDT
Weather
☁️ Cloudy · 9°C–23°C
Last Year's Race
· Wind 12 km/h
Registration
Open Now
Closes May 13, 2026
Website
Official website →
Event Details
It’s the Ultimate Urban Tour of Denver with epic sites. Start and finish in Denver’s City Park. Run through Empower Field at Mile High – twice! Run through Denver Fire Station #1, along seven miles of rivers, lakes and bridges – including Sloan’s Lake. Race through eclectic neighborhoods, historic Lakewood, the bustle of Colfax Avenue, and downtown Denver – with views of the majestic Rocky Mountains!
This is one for the bucket list! The Colfax Marathon is a Boston Marathon qualifier race.
Event type
Full-Marathon
Distance
42.2 km
Surface
Road
Registration opens
April 12, 2026
Registration closes
May 13, 2026
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