Seward Solstice Run
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Event overview
The Seward Solstice Run takes place on Saturday, December 20, 2025, at Seward Park in Seattle, WA. It is the fourth event in the 2025-26 Winter Trail Series. The event offers the following distances:
- 4.2-mile
- 10k
Registration uses tiered pricing with day-of registration available. Online pre-registration closes December 18. Runners under 20 years of age receive a $10 discount on pre-registration or day-of prices.
Course, logistics and series details
The course is a loop mostly through the park's old growth forest on the park peninsula. The route begins on a wide main trail that is flat-to-rolling, dips downhill toward the peninsula tip, then turns onto smaller trails climbing and traversing the western side. A short return segment is twisty with small fallen trees, roots, and bumps before the trail widens again. 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 offerings include water, an electrolyte drink, and a selection of carbohydrate-rich or salty foods.
The event includes a costume contest with a "Glitter, Glamour, and the Galaxy" theme, separate awards for group and individual costumes per distance, and a requirement that winners be present to receive awards. Series scoring ranks participants by their best four performances, awards points in Female and Open categories, and requires at least three scores for series awards. Visit the organization's website for the most recent information.
