Register now to save with Early Bird Pricing! New in 2022: 5k, 10k + Kids Run.


Boulderthon is proud to present Marriott and St. Julien as our partner hotels.

Courtyard Boulder

Exclusive Boulderthon Rate - $199/night. Book now.

Start Date: Friday, October 7, 2022
End Date: Sunday, October 9, 2022
Last Day to Book: Thursday, July 7, 2022

St. Julien Hotel

Elevate your stay with Boulder's premier luxury hotel. Book now. Exclusive Boulderthon Rate: $479/night.