Winterfest 5k & Fun Run

Embrace the holiday spirit at the Winterfest 5k & Fun Run in Thornton, Colorado on December 13, 2025. Choose between a chip-timed 5k race or a fun, untimed Fun Run/Walk at Carpenter Park, suitable for both seasoned runners and those seeking a festive activity with loved ones. Stick around post-run for Winterfest festivities including ice skating, a Holiday Marketplace, Santa visits, and a cozy Heated Beer Garden. Toast to winter's best with a warm drink in a collectible mug at the finish line and kick off the holiday season in style. Join us for a day of joy and community spirit in Thornton!