2024 Boulderthon: Colorado’s Largest Fall Race Series

Date and Time for this Past Event

Fri, Sep 27, 2024 - Sun, Sep 29, 2024

Location

Details

We believe Boulder, one of the great running hubs of the country, deserves a world-class marathon series. We're proud to announce that USA Today has recognized Boulderthon's 5K as the 5th best and its half marathon as the 8th best in the nation in its 2024 10 Best Readers' Choice awards.

Boulderthon Expo Dates: Friday, September 27th from 2- 6 PM & Saturday, September 28th from 10 AM - 6 PM on the Pearl Street Mall between 13th & 15th streets. All races will be held on Sunday, September 29th. View race schedule here.

Behind every great marathon is an exceptional team of volunteers, and we invite you to be a part of ours. As a volunteer, you'll receive an official Boulderthon Volunteer Shirt, a 50% discount for the 2025 Boulderthon, community service hours (if applicable), and the chance to provide vital support and encouragement to our runners. Explore the various roles and shifts available on our volunteer signup platform if you'd like to join us for the 2024 race.