/** Visit Denver Hotel Script **/ 2-Day Mile High Challenge - Denver Colfax Marathon

2-Day Mile High Challenge

It’s back again! Run the marathon, half marathon, urban 10 miler, or marathon relay on Sunday and the 5K on Saturday, and you’ll receive our Colfax 2-Day Mile High Challenge award as well as your Sunday medal.

Special thank you to Taiwan Tourism Administration, Presenting sponsor of the 2-Day Mile High Challenge

2-Day Mile HIgh Challenge

Great awards for running 2 days. 3D etched silver made into a striking metal coaster.

 

Want to do the 2-day challenge?

When you register, there is a question on the registration page asking if you’d like to join the Colfax Mile High Challenge. Check “yes”, and you’ll be set! Running the relay?  Whether you are a captain or a relay runner you can register for the 5K separately and answer that you are running also on Sunday.

2 Shirts, plus your Sunday Medal and 2 Day award

Yes – you receive 2 shirts, a medal and an award! Pictured here is the 2026 half marathon medal.