All-out Spring Fever

Join the 13th annual All-Out Spring Fever on Sunday, March 22, 2026, in the scenic city of Golden, Jefferson, for an unforgettable day of running and outdoor excitement. Hosted by All-Out Multicourse Productions, this premier event offers race distances including a 5K, 10K, and Half Marathon, all set against the breathtaking views of Table Mountain and Colorado’s picturesque foothills. Runners will enjoy courses that wind along the tranquil shores of Arvada’s Blunn Reservoir via the beautiful Ralston Creek Trail, combining challenging terrain with stunning natural scenery. Whether you’re a first-time racer or an experienced athlete seeking a new personal best, All-Out Spring Fever provides the perfect blend of fitness, community spirit, and scenic adventure. Don’t miss this exceptional opportunity to race in one of Colorado’s most beautiful locations—mark your calendar and get ready for a memorable and inspiring race day experience.