COLORADO'S PREMIER FALL EVENT

Just in: Boulderthon rated top 10 in America by USA Today

After nearly tripling in size last year and selling out, Boulderthon sets new 10,000 runner cap

Boulderthon is one of the top-rated marathons in the United States

Named among the Best Fall Marathons by Runner's World, #5 Best Half Marathon in the US by Active, as well as #1 Best in Colorado and one of the "Most Beautiful Marathons in the World" by HalfMarathons.Net, Boulderthon drew over 6,000 runners from all 50 states and 18 countries in 2023, and has doubled in size every year since its inception.

In 2024, USA TODAY named Boulderthon’s 5K the #5th best in the country, while simultaneously announcing its Half Marathon as the #8th best in the US, in its 2024 10Best Readers’ Choice awards. The lists are curated by USA Today 10Best editors reviewing thousands of races across the country, narrowing it down to the top 20 in each category by a panel of expert runners, and then voted on by readers to determine the winners.

A boutique marathon experience with big-city energy + amenities tucked away in the foothills of the Rockies

An award-winning race series staged in the Happiest City in America - National Geographic

RACES

MARATHON

HALF MARATHON

10K PRESENTED BY CHERIBUNDI

HEART TO HEART 5K BY BCH

KIDS RUN

VIP BY LULULEMON

Race Start Times

Half/Full Marathon: 7:00am

5K: 7:45am

10K: 8:25am

Kids Run: 9am

Race Start Locations

Half/Full Marathon: 19th and Pearl, Boulder, CO 80302

5K: 21st and Pearl, Boulder, CO 80302

10K: 19th and Pearl, Boulder, CO 80302

Kids Run: 21st and Pearl, Boulder, CO 80302

Proud to welcome the following artists, presented under the Xcel Power-Up Cheer Stations program. The first spectators will receive special giveaways and swag from Boulderthon! Come on out and support our runners.

ELVIS - Aaron Black

JC Unplugged

Wylie Jones

DJ Princess Wallace

Gregg Green

Michael DeCapua

Eric Ottem Jazz Unit

Jami McNeil

SK8 D8

Spencr DeJaynes

Awards

Top 10 Overall receive Top 10 Finisher Award & 50% off Boulderthon 2025 for Half & Full Marathon.

Top 3 Male & Top 3 Female Overall Finishers win prize money for Half & Full Marathon. Top 3 Awards are based on Gun Time.

Top 10 Overall receive Top 10 Finisher Award & 50% off Boulderthon 2025 for Half & Full Marathon. Top 10 are based on Gun Time. Age Group Awards are based on chip time.

Top 10 Finishers are not eligible for Age Group Awards for Half & Full Marathon.

There are no Top 10 Finisher Awards, Age Group Awards or prize money for the Kids Run, 5K, or 10K.

Course Maps

Race Fee: $36.38-$298.53

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