All-Out Spring Fever

MAR
22
2026
Join All Out Spring Fever on March 22, 2026 in Golden Colorado for scenic runs along Ralston Creek and Blunn Reservoir near Table Mountain. Choose half, 10K or 5K on course or virtual, benefit UpRoot Colorado and qualify for BOLDERBoulder.
Sun 22 Mar 2026
Half Marathon 10 kilometers 5 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

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.

Half Marathon
Half Marathon
10 km
10k
5 km
Virtual 5k
Virtual 10k
Virtual Half Marathon

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