All-Out Spring Fever

MAR
22
2026
A spring running event in Golden CO with 5K, 10K and half marathon courses along Ralston Creek Trail plus virtual options. The event benefits UpRoot Colorado and is an official BOLDERBoulder qualifier.
Sun 22 Mar 2026
Half Marathon 10 kilometers 5 kilometers

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All-Out Spring Fever : Golden, Colorado

All-Out Spring Fever is a running event held in Golden, Colorado, based at 19500 W 64th Pkwy near Table Mountain and the Colorado foothills. Courses use local paths and trail access, including the Ralston Creek Trail and the shores of Arvada's Blunn Reservoir. The site is described as easily accessible from nearby highways.

The event program includes multiple distance options:

  • Half Marathon
  • 10K
  • 5K
  • VIRTUAL Half Marathon
  • VIRTUAL 10K
  • VIRTUAL 5K

Both in-person and virtual options are listed. Virtual entries allow participants to run at a location of their choice while receiving event recognition and swag. The event is designated as an official BOLDERBoulder qualifier, so finishing times from these distances may be used for BOLDERBoulder wave qualification. The event benefits the charity UpRoot Colorado, which focuses on harvesting and redistributing surplus produce to increase nutrition security.

Organizational information identifies All-Out Multicourse as the host and notes the event is part of the organizer's seasonal series, presented as the spring counterpart to Kooky-Spooky. The description focuses on course setting, offered distances, virtual participation, charitable benefit, and the BOLDERBoulder qualifier status. Visit the organization's website for the most recent information.

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