All-Out Kooky-Spooky

NOV
1
2026
Lace up for All Out Kooky Spooky in Golden a festive fall race along Ralston Creek with half, 10K and 5K plus virtual options. Enjoy a costume contest, medals with free engraving and BOLDERBoulder qualifying times.
Sun 1 Nov 2026
Half Marathon 10 kilometers 5 kilometers

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Event overview

The All-Out Kooky-Spooky is scheduled for Sunday, November 1, 2026, in Golden, Colorado. This is the 15th annual running of the event, produced by All-Out Multicourse Productions. The venue is Jefferson County's NAAC Stadium, at 19500 W 64th Pkwy, Golden, CO 80403. The event date falls on the day daylight saving time ends.

Distances

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

Course and event features

Courses run along the Ralston Creek Trail and pass Arvada's Blunn Reservoir. The 10K uses a loop course. The event includes an official costume contest and provides medals for all finishers, with free medal engraving offered. Organizers note on-course support for each distance and mention that dogs are included among on-course support elements. Free parking is available at the venue.

Series, qualifying, and beneficiary

The race is part of the All-Out Endless Series (with Spring Fever) and is designated as an official BOLDERBoulder qualifier; finishing times from this event may be used for BB10K qualifying waves. The event benefits the National Kidney Foundation of Colorado. Visit the organization's website for the most recent information.