Boulderthon

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

10/27/2026

Just your average day in Boulder.

17,000 runners, one city, and a whole lot of energy. Boulderthon looks pretty good from up here. 👀💙

10/21/2026

The miles, the cheers, the people, the moments that made it all worth it. 💙

Boulderthon 2026 was so much more than a race. It was a day full of memories we’ll carry with us long after crossing the finish line.

Here’s to the moments that remind us why we run.

10/09/2026

...and that we did!!!

Thanks to all who joined us for 2026, we’re already looking forward to holding it down again next year 💁‍♂️

10/08/2026

Still feeling the energy from race day 🔥🏃‍♀️

From the miles to the cheers, lululemon brought the hype to Boulderthon 2026! The energy was unreal, the community showed up, and the vibes were unmatched.

Huge thank you to lululemon for helping make race day one to remember. 💙

10/07/2026

A bittersweet moment 🥲 Who else is feeling this way? Tag a friend 👇

10/01/2026

Boulderthon 2026, you were one for the books.

Thank you to every runner, volunteer, spectator, partner, and person who brought the energy to Boulder. We couldn’t have asked for a better race day.

Until next year🏃‍♀️🏃‍♂️💨

Comment your favorite race day memory below 👇🏼

09/30/2026

The day in slow motion 🎞️🏔️

Trying to hold onto all the little moments that went by way too fast. The miles, the views, the cheers, the people, the adrenaline, and that feeling of realizing you actually did the thing.

Feeling incredibly grateful for this day and for everyone who showed up and gave it their all. Whatever your goal was, however the day went, I hope you’re proud of yourself. We all earned this moment. 🤍

Boulderthon 2026, thank you for the memories.

09/28/2026

Still taking it all in 🙏🏼

Thousands of runners. Countless miles. One unforgettable day in Boulder.
From the starting line to the final stretch, the energy, determination, and support we saw yesterday were something special.

To every runner, volunteer, spectator, partner, crew member, and person who showed up and made Boulderthon 2026 what it was, thank you.

This is Boulderthon. And we already can’t wait to do it all again. 🏔️🏃‍♀️🏃‍♂️

09/27/2026

OUR FIRST PLACE MALE FINISHER OF THE 5K 🥇

Nigsti Molla Hagos of Addis Ababa, Ethiopia!
⏱️ Time: 15:26
🏃🏽 Pace: 4:58

CONGRATS! 🎉

09/27/2026

OUR FIRST PLACE FEMALE FINISHER OF THE 5K 🥇

Nigsti Molla Hagos of Addis Ababa, Ethiopia
⏱️ Time: 15:26
🏃🏽 Pace: 4:58

CONGRATS! 🎉

Address

Boulder, CO
80302

Website

http://www.boulderthon.org/

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