Seward Solstice Run

Saturday, December 20, 2025 9:30am Start Seward Park, Seattle, WA Situated on a peninsula surrounded by Lake Washington, Seward Park provides perhaps one of the greatest contrasts in Seattle: 100+ acres of old growth forest, just minutes from the city center. The run route follows a loop that is almost entirely in the forest, so there is ample opportunity to enjoy what the Friends of Seward Park fondly call “The Magnificent Forest,” with graceful Western Red Cedar and towering Douglas Fir, along with a lush tapestry of other native plants. You may even hear a Pileated Woodpecker pecking out a nest or rooting for a meal in an old tree trunk. Join us for a 4.2-mile or 10k trail run at Seward Solstice, the fourth event in the 2025-26 Winter Trail Series! Want to keep motivated all winter long? Use the series registration page to sign up for more than one Winter Trail Series event at once!