The BOLDERBoulder is one of Colorado’s most famous Memorial Day events and one of the most celebrated 10K races in the country. Held each year in Boulder, Colorado, this high-energy race brings together runners, walkers, wheelchair racers, families, costumed participants, elite athletes, spectators, and community groups for a one-of-a-kind Boulder tradition. The event began in 1979 and has grown into a major Colorado gathering known for its neighborhood course, lively crowd support, creative costumes, live entertainment, and festive race-day atmosphere.
The next BOLDERBoulder takes place on Monday, May 31, 2027, and early registration is now available. The 10K course winds through Boulder neighborhoods and finishes inside Folsom Field at the University of Colorado Boulder, where participants and spectators gather for the professional race finishes and the annual Memorial Day Tribute. It’s a great event for runners, families, visitors, and anyone looking for a memorable Memorial Day weekend experience in Boulder.