Join us for the 15th annual Kooky-Spooky race, featuring a 5K, 10K, and half marathon. Starting from Jefferson County's NAAC Stadium , the courses wind along the scenic Ralston Creek Trail and by Arvada's Blunn Reservoir. Celebrate Halloween by wearing your costume for our official contest, and enjoy that extra hour of sleep as daylight saving time ends! This event is easily accessible from nearby highways, benefits the Colorado National Kidney Foundation, is part of the Endless Series with Spring Fever, and serves as an official BOLDERBoulder Qualifier!

11-01-2026, 09:00 am - 03:00 pm