Join us on Sunday, September 27th, 2026 at 8:25AM for the fourth-annual Boulder Country Day School Kids Fun Run in Boulder, Colorado. The course starts at 19th and Pearl and ends with an incredible finish on the historic Pearl Street Mall! The Boulderthon is the perfect introduction to racing for your little ones! Parents can run for free with their child!?

Staged in the Happiest City in America (National Geographic), this is a race weekend that feels as good as it looks.