Colorado Runner - Colorado's running news, events and results source

The Bolder Boulder started in 1979 as a small local race with a few thousand people joining together to celebrate Memorial Day. Forty-five years later, the race has attracted more than 1.6 million people to walk, jog and run.

What if I told you a big secret that helps you feel good, smile more, and maybe even live longer? This secret isn't hidden anywhere; it's called fitness. That means moving your body in fun ways like walking, dancing, or riding a bike.

The BOLDERBoulder announced the official lineup for the 2025 International Team Challenge. Professional runners from across the globe will compete in this prestigious event, representing their countries in both the men’s and women’s divisions.