All your critical race info in one place: You will receive an email with your QR code for Bib Pickup on 9/15. Early Bib Pickup is open from Saturday, 9/21 through Thursday, 9/26 at 2pm at all Colorado Fleet Feet locations during their normal hours. Early Bib Pickup does not include a Gear Check Bag, Team Bib Back Bib, or Finisher Shirt. Please visit the Expo for those items (you can pick up your Finisher Shirt post-finish as well). Boulderthon uses dynamic bib assignment, meaning there is no need to register for your bib pickup location (your bib will be assigned at the time of pickup).
Visit our Expo between 13th and 15th on the Pearl Street Mall in Downtown Boulder - Friday, Sept 27th from 2PM - 6PM and Saturday, Sept 28th from 10AM - 6PM. Join us for 75+ vendors and amazing new programming this year, including a Live Panel with 3 Olympians, Dakotah Lindwurm, Molly Seidel and Rory Linkletter, and one of the GOATs, Scott Jurek, on Saturday at 2pm in front of the Boulder County Courthouse.
View our All-in-One Course Map and Start/Finish Maps here.
Live tracking will be available here on Race Day and on our Apps (available 9/15).
The Half/Full Marathon will start at 7:00am, the 5K at 7:45am, the 10K at 8:25am and Kids Run at 9am. All races are on Sunday, 9/29. All races start at 19th and Pearl, except for the 5K, which is at 21st and Pearl. Here are the best ways to get to the Start.
USA Today Readers Choice - April 17th, 2024
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.
Tucked into a picturesque valley below the iconic Flatirons, Boulder, Colorado sets the backdrop for the top-ranked, signature Boulder Marathon, Boulderthon. Boulder is a world-class destination offering 300 days of sunshine and endless recreation, shopping, dining, cultural and entertainment choices. It's no wonder National Geographic named Boulder the Happiest City in America.
Boulderthon 2024: Full Marathon
Run the Boulder Marathon in the happiest, fittest city in the US! Includes Finisher Medal, Finisher Shirt, 1 Free Beer, Timing Chip.
Boulderthon 2024: Half Marathon
Run the Boulder Marathon in the happiest, fittest city in America! Includes Finisher Medal, Finisher Shirt, 1 Free Beer, Timing Chip.
Boulderthon 2024: 10K
A fun, fast Downtown Boulder 10k to kick off Fall! Includes Finisher Medal, Timing Chip, Long-Sleeve Finisher Shirt.
Boulderthon 2024: Heart to Heart 5k Presented by BCH
Run our fourth annual 5K, with a fun, fast course! Includes Medal, Finisher Shirt, Timing. Strollers welcome.
Boulderthon 2024: Kids Run
Run Boulder's third annual Kids Run! Includes Kids Finisher Medal and Kids Finisher Shirt.
Feel on top of the world!
Boulder is a world-class destination offering 300 days of sunshine and endless recreation, shopping, dining, cultural and entertainment choices. It's no wonder National Geographic named Boulder the Happiest City in America.
“Racing in Boulder, Colorado, should be on every runner's bucket list, and the Boulderthon Half Marathon might be the perfect way to cross it off. The course starts at Boulder Reservoir, which gives you a true sense of Colorado's scenic beauty. Then you run along the foothills of the Flatirons. Finally, you wind your way into downtown Boulder and finish on the historic Pearl Street Mall.
Veteran runners have touted this as one of the best race events of their lives; it has all the amenities of a big race (gear check, pace groups, plentiful aid stations) with the charm and attention to detail of a small race. Plus, it's a downhill finish!” - Active.com
