Castle Rock Trail Festival Castle Rock, CO   Oct 3, 2026

Challenge yourself on Castle Rock’s vast ridgeline trail system. This epic athletic event has something for everyone — from ultra-distance runners to families with children ages 5 to 12. If you’ve run this trail system before, you know these are some beautiful and beguiling trails. 

Races will begin near The Amphitheater at Philip S. Miller Park and wind through the single and double-track trails at Philip S. Miller Park and Ridgeline Open Space. You will take in the impressive views of the surrounding buttes and the scenic views of Castle Rock as the trail twists and winds over the flowing race course.

Participants can explore the breathtaking trails of Philip S. Miller Park and Ridgeline Open Space, pushing their limits in the longer races or creating lasting memories on the family-friendly obstacle course at the liveBIG Family Adventure Run.