8th Annual ☘️ShamROCK Stampede 5k & RRCA 10k State Championship☘️

Lace up for the 8th Annual ☘️ShamROCK Stampede 5k & RRCA 10k State Championship☘️, set to electrify Castle Rock, CO, on Saturday, March 14, 2026. This popular event offers a distance for every runner, featuring the prestigious RRCA Colorado State Championship 10K, a lively 5K, and a FREE 1K Kid's Dash. The course winds along the scenic East Plum Creek Trail, presenting a trail run experience with some engaging hills to challenge participants. Starting and finishing at the Douglas County Event Center at 500 Fairgrounds Road, the event promises a vibrant atmosphere.

More than just a race, the ShamROCK Stampede is a full St. Patrick's Day celebration. Runners and spectators can immerse themselves in an Irish-themed festival, explore the Back to Health Expo, and enjoy a FREE public concert. Typical race day conditions in mid-March often bring pleasant highs around 54°F and lows near 27°F, with only a 5% chance of precipitation, creating ideal running weather. Participants can look forward to custom "bling" medals and soft triblend tees, with kids in the 1K receiving a commemorative necklace charm.

What truly makes this event unique is its heartwarming mission: all proceeds directly benefit organizations dedicated to helping veterans, first responders, and individuals find mental wellness and break free from PTSD, including the It's A Calling Foundation and Live Free Association. After crossing the finish line, celebrate your achievement with a free beer from 105 West Brewing Company or a spirits drink from Molly Brown Spirits (for those 21+), along with complimentary bagels from Einstein Bros. Bagels, all while enjoying live Irish music. Join the ShamROCK Stampede to run, celebrate, and support a life-changing cause.