All-Out Spring Fever
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Event overview
All-Out Multicourse presents the 14th Annual All-Out Spring Fever on March 22, 2026 in Golden, Colorado, at the base of Table Mountain and the Colorado foothills. The venue is reachable from several nearby highways. The on-site courses follow the Ralston Creek Trail and trace the shores of Arvada's Blunn Reservoir.
The event offers these race options:
- Half Marathon
- 10K
- 5K
- VIRTUAL Half Marathon
- VIRTUAL 10K
- VIRTUAL 5K
The event is an official BOLDERBoulder qualifier, and finishing times from any distance may be used to qualify for BOLDERBoulder waves. Virtual options allow participants to run anywhere.
Charity and series information
All-Out Spring Fever benefits UpRoot Colorado. UpRoot Colorado focuses on increasing nutrition security in Colorado by harvesting and redistributing surplus, nutrient-dense foods and by supporting the resilience of family farms. The organization also works on community education, research, and projects that address agricultural issues.
The race is part of the Run Amok Spring Series. A bundled registration with All-Out Beat the Heat includes a 25% discount per distance when both events are selected. Visit the organization's website for the most recent information.