8th Annual ShamROCK Stampede 5K, RRCA 10K Championship & Free Kids' Sham-Scram

The 8th Annual ShamROCK Stampede — Castle Rock's St. Patrick's Day racing tradition — runs Saturday March 14, 2026 at the Douglas County Event Center, featuring the RRCA Colorado State Championship 10K at 10:00 AM, a 5K at 10:15 AM, and the FREE 1K Kid's Sham-Scram at 10:50 AM. Course runs along the East Plum Creek Trail. Indoor Health Expo, costume contest at 9:15 AM, awards at 11:00 AM, and a post-race Irish-themed festival. All proceeds benefit the It's A Calling Foundation and Live Free Association, supporting veterans, first responders, and others breaking free from PTSD. Part of the Run to Change Lives ROCK & RUN Series alongside the July 4th Rock-It Run and Thanksgiving Turkey ROCK Trot.