All-Out Kooky-Spooky

NOV
1
2026
A multi-distance running event in Golden, Colorado around Blunn Reservoir with in-person 5K, 10K, Half Marathon and virtual options, a costume contest, course fueling, and series awards eligibility.
Sun 1 Nov 2026
13 miles 10 kilometers 5 kilometers

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All-Out Kooky-Spooky

All-Out Kooky-Spooky is the 15th annual event presented by All-Out Multicourse at Jefferson County's NAAC Stadium in Golden, Colorado, near the base of Table Mountain. The in-person courses follow sections of the Ralston Creek Trail and run along the shores of Blunn Reservoir.

Distances offered:

  • Half Marathon - 13.1 Miles
  • 10K - 10 kilometers
  • 5K - 5 kilometers
  • Virtual Half Marathon - 13.1 Miles
  • Virtual 10K - 10 kilometers
  • Virtual 5K - 5 kilometers

In-person courses start and finish at the east end of the NAAC parking lot and use the sidewalk on the south side of W 64th Pkwy and underpasses to access Ralston Creek Trail. The Half Marathon includes a 7 mile out-and-back dogleg before rejoining a counter-clockwise loop around Blunn Reservoir; organizers note eight fueling opportunities and three toilets on that course. The 10K route follows the trail past Tucker Lake around the reservoir and lists three fueling opportunities and one toilet. The 5K is an out-and-back with two fueling opportunities.

Virtual participants receive event SWAG including a distance medal shipped the week after the event, remain eligible for series finisher awards and alumni brag tags, and receive distance credit toward the Run Amok Championship. The event date coincides with the end of daylight savings time and includes an official costume contest. Visit the organization's website for the most recent information.

13 mi
Half Marathon
10 km
10k
5 km
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