Seward Solstice Run
Seattle, United States • 20 Dec 2025
Event overview
The Seward Solstice Run is scheduled for December 20, 2025, at Seward Park in Seattle, WA. The event is part four of the 2025-26 Winter Trail Series. Distances offered are:
- 4.2-mile
- 10k
The event includes a costume contest with one winner chosen from each distance; each winner receives a free entry to a future Northwest Trail Runs event. Runners under 20 years of age are eligible for a $10 discount on online pre-registration or day-of prices. Online pre-registration closes December 18. Day-of registration is available and accepts cash, card, or check.
Course, aid and series details
The course is a loop that is almost entirely in old growth forest on the Seward Park peninsula. The route starts on a wide main trail that is flat-to-rolling and then dips downhill toward the peninsula tip. The return follows smaller trails that climb and traverse the western side of the peninsula, including a short twisty section with small fallen trees, roots, and other surface irregularities. An aid station is located adjacent to the start/finish area; 4.2-mile runners pass it once and 10k runners pass it twice. Aid station supplies include water, electrolyte drink, and a variety of carbohydrate-rich or salty foods. Participation in four or more Winter Trail Series events earns a limited edition pair of series socks. Visit the organization's website for the most recent information.