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 40 years and the BolderBOULDER has grown to become one of the largest and most highly acclaimed 10Ks 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.

The BolderBOULDER is still locally owned and operated, and our dream continues. This event has taken on a life that we never quite envisioned, and it rewards us every year beyond measure.

Commemorate the 40-year milestone—its founders, the memories, the record-breaking finishes, the posters, the t-shirts, the celebrities, the spectators and more—with this beautiful, captivating hardcover book.