LET'S DO THIS! All your key info in one place: Early Bib Pickup is open to all and runs from Saturday 9/30 through Thursday 10/5 at all Fleet Feet Colorado locations. Please show your QR code from your email to pick up your bib. All Finisher Shirts & Finisher Goody Bags will be available at Expo/Finish Line. Start Village is at 15th & Pearl (Bag Check available). Start Line for all races is at 21st & Pearl. Here's how to get to the Start. Half + Full Marathon start at 7:30am, 5k + 10k at 8am, Kids Run at 8:30am. View our Race Weekend Schedule. Questions? Please email support@boulderthon.org. We can't wait to run with you!
Named #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 4,000 runners from all 50 states and 15 countries in 2022, nearly tripling in registration, and selling out.
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 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 Half Marathon
Run the Boulder Marathon in the happiest, fittest city in America! Includes Finisher Medal, Finisher Shirt, 1 Free Beer, Timing Chip.
Boulderthon 10K (SOLD OUT)
Bookend your season with a fun 10K! Includes Finisher Medal, Finisher Shirt, Timing Chip.
Boulderthon 5K (SOLD OUT)
Run a fun, fast 5K! Includes Finisher Medal, Finisher Shirt, and Timing Chip.
Denver Zoo Kids Run (SOLD OUT)
Run Boulder's 2nd annual Kids Run, Presented by the Denver Zoo! 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
