Seward Solstice Run
Seattle, United States • 20 Dec 2025
Event overview
The Seward Solstice Run takes place on December 20, 2025, at Seward Park in Seattle, WA. It is the fourth event in the 2025-26 Winter Trail Series. Distances offered for the event are:
- 4.2-mile
- 10k
Series participants who complete four or more Winter Trail Series events in the 2025-26 season earn a free pair of limited edition Winter Trail Series socks. Runners under 20 years of age receive a $10 discount on online pre-registration or event-day prices.
Course, amenities and policies
The route is a loop that is almost entirely in Seward Park forest. The course begins on a wide, smooth main trail that is flat-to-rolling, then dips downhill toward the peninsula tip. The return section follows smaller trails on the west side of the peninsula, including a twisty segment with small fallen trees, roots, and other uneven features before widening again near the end of the loop.
An aid station is located adjacent to the start/finish area; 4.2-mile runners pass it once and 10k runners pass it twice. A themed costume contest (Glitter, Glamour, and the Galaxy) includes Most Festive Group and Most Festive Individual categories per distance; winners must be present to receive awards. Dogs are not allowed on the course under event USATF policies. Runners are asked to follow passing and headphone etiquette for the safety and comfort of others. Visit the organization's website for the most recent information.