Boulderthon

Boulderthon Run a Marathon in the Happiest City in the US! Boulder Marathon, Half, 10k, 5k!

06/19/2026

Time to giddy up and register, spots are filling up fast! 💨 👢

06/16/2026

Known as one of the most beautiful marathons in the world, Boulderthon is Colorado’s premier fall event.
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Don’t miss out on the vibes, the views, or the fun.🏃

06/11/2026

#1 is really the worst fear of all 🫣
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Comment yours below 👇🏼

06/10/2026

Mountains aren’t the only thing we’re moving. ❤️

This Boulderthon, .mountains.together and Brandon are taking on a challenge that’s bigger than the miles ahead. Brandon is a 40-year-old athlete living with cerebral palsy, and together they’re running with purpose through the “Brandon Moves Mountains” campaign—to raise funds for Children’s Hospital Colorado and support the incredible kids and families they serve.

Every step, every mile, and every donation helps make a difference.

If Brandon’s story inspires you, they’d be honored to have your support. The donation link is in our bio and stories.

Together, we can move mountains. 💙⛰️🏃‍♂️

05/30/2026

🎨 Excited to host our second volunteer opportunity, where we painted the handball wall, a shed, and de-weeded at ’s Tom Watson Park. We’re so grateful to the community for the opportunity and to our volunteers for making it happen. See you next time! 👋

05/27/2026

You never know someone’s “why”. We’re here for all of them. 💪🏼

05/27/2026

The finish line effect: exhaustion, relief, joy… and that moment when it all hits at once.
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We can’t wait to see you there.

05/26/2026

Race mornings, sunrise miles, and that quiet pre-start energy, it’s all part of the experience here.
See you in Boulder. 🏔️

05/06/2026

We’re not like other races, we’re a cool race 💁‍♀️

05/01/2026

Have no shame in your pace game 🏃🫶

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Boulder, CO
80302

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