All-Out Spring Fever

All-Out Spring Fever is an annual running event held in Golden, Colorado, at the base of Table Mountain and the scenic foothills. Scheduled for March 22, 2026, it offers multiple race distances including a Half Marathon, 10K, and 5K, with virtual options available for all distances. The courses feature picturesque routes along Arvada's Blunn Reservoir and the Ralston Creek Trail, providing a rewarding challenge for runners of all levels.

This event is an official BOLDERBoulder qualifier and benefits UpRoot Colorado, a charity focused on increasing nutrition security by redistributing surplus nutrient-dense foods. The race celebrates spring with a lively atmosphere and a mascot named Buzzby. Visit the organization's website for the most recent information.