- This event has passed.
May 30 @ 8:00 am - 2:00 pm
BolderBOULDER is one of the largest and most highly acclaimed 10Ks in the world. Whether you want to run or enjoy watching, BolderBOULDER is a ton of fun! 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 BolderBOULDER hosts 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.