Denver Colfax Marathon

Denver, CO, USA
17-18 May, 2025 (Sat - Sun)
Event size: 10000 - 24999 participants

Running

5 km, 10 mi, 21.1 km, 42.195 km

About the event

Run Denver’s springtime marathon and experience the ultimate urban tour of the Mile High City! 26.2 mile Marathon through the stadium, downtown and along 7 miles of water - 13. 1 mile Half Marathon through Denver Zoo - the fast Urban 10 Miler - 5-person Marathon Relay - or the Colfax 5K in City Park. Run for more than 100 charities!

Races offered by this event

You have 25 weeks to prepare

Colfax 5K

17 May, 2025 (Sat)
Running
5 km
Solo
On site
Road

Urban 10 Miler

18 May, 2025 (Sun)
Running
10 mi
This is Denver's ultimate urban tour - abbreviated. Epic stadium run through. Downtown Denver. Confluence and Cherry Creek, 17th Avenue to City Park - and one big afterparty with 10,000 of your closest friends.
Solo
On site
Road
Timed

Marathon

18 May, 2025 (Sun)
Running
42.195 km
View course map
Run Denver’s springtime marathon and experience the ultimate urban tour of the Mile High City! 26.2 mile Marathon through the stadium, downtown and along 7 miles of water - 13. 1 mile Half Marathon through Denver Zoo - the fast Urban 10 Miler - 5-person Marathon Relay - or the Colfax 5K in City Park. Run for more than 100 charities! May 17-18, 2014. Choose your event at runcolfax.org.
Boston Marathon qualifier
Solo
On site
Road
Timed

Half Marathon

18 May, 2025 (Sun)
Running
21.1 km
Run the wildest race in Denver! The Colfax Half Marathon is the only race to run through Denver Zoo - past the cheetahs, elephants and rhinos! Run for more than 100 charities.
Solo
On site
Road
Flat
Timed

Marathon Relay

18 May, 2025 (Sun)
Running
42.195 km
Boston Marathon qualifier
Relay (5)
On site
Road

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