In 1979, we dreamt of attracting a few hundred of our friends to race though the streets of Boulder, Colorado to celebrate Memorial Day with our families. Fast forward almost 40 years and the BolderBOULDER has grown to become one of the largest and most highly acclaimed 10K’s in the world.
Almost 1.2 million runners, joggers, walkers and spectators of all ages have gathered over the years to create a spectacle that defies description. Olympic medal winners and hopefuls, grandmothers and kids, running enthusiasts, and one-race-a-year guests from all over the world come together at the foot of the Rocky Mountains to form one of the sport’s truly unique events. Each year we host 50,000+ participants and 100,000+ spectators throughout the course for what we like to call the biggest and best Memorial Day celebration on earth.