UPDATE: We have to change our date for the second time, and we are incredibly sorry. Based on the CU Football schedule, Boulderthon 2024 will move its date from September 22nd, 2024 to the following weekend, September 29th, 2024.

Why did our Race Director, @phildumontet start the Boulderthon? Watch to find out😘

This could be you after crossing the finish line of the 2023 Boulderthon😘 Dreams don’t work unless you do👊🏻👊🏻

Come run the best race of your life- the Boulderthon Marathon, Half Marathon, 10K, 5K & Kids Run! Sign up today: boulderthon.org/register/

Join us on October 8th for the BEST day of your life🪩 Pick your challenge: -Full Marathon -Half Marathon -10K -5K -Kids Run And get running🏃🏾🏃‍♂️🏃🏻‍♀️

In 2022 I loved running @Boulderthon so much I've stepped up to help with their 2023 race - if you're looking for a fall 5K, 10K, half, or full marathon - registration is open! boulderthon.org/

HalfMarathons.net named the Boulderthon as the BEST Half Marathon in Colorado! Sign up to run our 2023 edition here: boulderthon.org/register/