All-Out Spring Fever
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All-Out Spring Fever - Golden, CO
All-Out Spring Fever takes place on Sunday, March 22, 2026, at the Ralston Creek Trail in Golden, Colorado. The event is the 14th annual edition organized by All-Out Multicourse. Course descriptions note routes that trace the shores of Arvada’s Blunn Reservoir along Ralston Creek Trail, with Table Mountain and the Colorado foothills as a backdrop. The event is an official BOLDERBoulder qualifying race.
Distances and entry
The event offers in-person and virtual options:
- Half Marathon
- 10K
- 5K
- VIRTUAL Half Marathon
- VIRTUAL 10K
- VIRTUAL 5K
Virtual entries allow participants to run anywhere. Listed entry prices at the time shown are: Half Marathon $80.50 (youth/senior $64.60); 10K $59.30 (youth/senior $47.64); 5K $48.70 (youth/senior $39.16). Virtual Half $59.30 (youth/senior $47.64); Virtual 10K $48.70 (youth/senior $39.16); Virtual 5K $43.40 (youth/senior $34.92). Prices increase after March 8, 2026.
Charity and series
The race benefits UpRoot Colorado, an organization that increases nutrition security by gleaning surplus crops and redistributing them through food banks and pantries. The event is part of a Run Amok Spring Series that can be bundled with All-Out Beat the Heat (April 18, 2026) with a 25% discount per distance when registered together. Visit the organization's website for the most recent information.
