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.

2-Day Mile HIgh Challenge

Great awards for running 2 days – picture above is the 2024 award.


Want to do the 2-day challenge?

Not yet registered? Simply click here to register for the marathon, half, urban 10 miler or relay.  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.

Already registered for Sunday and want to add the challenge? Simply click here to register for the 5K.  There will be a question about also running on Sunday to ensure you will receive your award.

2 Shirts, plus your Sunday Medal and 2 Day award

Yes – you receive 2 shirts, a medal and an award!  Click here to see the main Sunday soft-tech race shirt and click here to see a high res photo of the 5K tech shirt!   Your award is pictured above and your medal is pictured here.