All-Out Kooky-Spooky

The All-Out Kooky-Spooky is a Halloween-themed running event held annually at Jefferson County's NAAC Stadium in Golden, Colorado, near Table Mountain and the Front Range foothills. Scheduled for November 2, 2025, it offers multiple race distances including a half marathon, 10K, and 5K, with virtual options available for all distances. The courses feature scenic routes along Arvada's Blunn Reservoir via the Ralston Creek Trail, suitable for all abilities.

The event includes a costume contest with multiple categories, medals for all finishers, and free medal engraving. It is an official BOLDERBoulder qualifier and benefits the Colorado National Kidney Foundation. The race provides ample parking, on-course support, and a festive Halloween atmosphere. Visit the organization's website for the most recent information.