2025 Marathons

Seattle 2025 Marathons

Your complete Seattle 2025 marathon calendar. Find every marathon happening in Seattle, Washington in 2025 with comprehensive race details, registration information, and official results, including the Seattle Ghost Marathon, Seattle Marathon, and UW Medicine Seattle Marathon.

Each marathon listing includes a 2025 marathon guide including dates, locations, course details, weather conditions, and relevant links for registration and more information. We maintain the most current results database, publishing official results on race day, plus complete 2024 results for year-to-year comparison.

Seattle Ghost Marathon

Seattle, Washington

November 29, 2025

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The Seattle Ghost Marathon features a flat, fast two-loop course along Lake Washington, offering stunning views and minimal elevation changes, ideal for runners aiming for a Boston Marathon qualifying time. With its roots dating back to 1985, this intimate race limits entries to 400 participants, providing a community-focused atmosphere supported by local non-profits, complete with aid stations every 3.1 miles and a cozy post-race celebration.

Seattle Marathon

Seattle, Washington

November 30, 2025

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The Seattle Marathon takes runners on a captivating journey through the city's iconic sights, starting and finishing at the Seattle Center near the Space Needle, with a course that blends urban excitement and natural beauty, including views of Lake Washington and the Olympic Mountains. Celebrated for its seamless organization and vibrant fall foliage, this challenging race with rolling hills and elevation changes offers an unforgettable experience, attracting runners eager to qualify for the Boston Marathon and embrace Seattle's unique charm.

UW Medicine Seattle Marathon

Seattle, Washington

November 30, 2025

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The UW Medicine Seattle Marathon takes runners on a dynamic course through iconic landmarks such as the Space Needle and Lake Union, with challenging elevation changes that test endurance and strategy. As the oldest marathon in the Pacific Northwest, it offers a rich running culture supported by enthusiastic local spectators and a variety of race distances, making it a celebrated event for both seasoned marathoners and newcomers.