Two days. Eight races.
Which one will you run?

Be a part of Marathon Weekend.  May 15-17, 2026

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

Register