2021 Colorado Marathon Change of Entry

Event Date: Sunday, October 24th, 2021

This form is for registrants who wish to change distances or switch to a virtual run for the 2021 event. 

There is no cost to switch to the virtual event or downgrade requests through Sep 15, 2021. There will be a $20 fee for distance changes submitted between Sept 16, 2021 and Oct 23, 2021. (Increasing your distance may incur an additional cost). 
Runners cannot change distances on race morning.

For event information visit www.comarathon.com

Click on a button below to begin your registration: