Big Bro Big Sis
Two days. Eight races.
Which one will you run?
Be a part of Marathon Weekend. May 16-18, 2025
Friday
- Cigna Denver Colfax Marathon Expo
Saturday
- Cigna Denver Colfax Marathon Expo
- Colfax 5K
Sunday
- Marathon
- Half Marathon
- Urban 10 Miler
- Marathon Relay
- Open Relay
- Corporate Relay
- Government Relay
- Public School Teachers Relay
