Halloween Trick or Trot Run 5K/10K/13.1 SEATTLE

Halloween Trick or Trot Run 5K/10K/13.1 SEATTLE is run on the streets of Seattle, Washington, on October 31, 2026. The half marathon (13.1 miles), the 10K, the 5K and a family one-mile fun run all start at 7:30 a.m., and there is an eco entry without a shirt for runners who would rather skip the extra kit. Finishers otherwise receive a runner shirt and a finisher medal.

Expect a damp start in the Pacific Northwest at the end of October and choose shoes with that in mind rather than your driest-day pair. The half marathon is worth a full twelve-week build with a weekly long run; the 10K and 5K can be run off existing fitness. Wave sizes are limited, a virtual option covers anyone who cannot attend, and complimentary treats and a talkative finish-line crowd round off the morning.