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Marathon directory
Marathons in Seattle, Washington
1 upcoming marathon listed in Seattle. Next: UW Medicine Seattle Marathon & Half Marathon on November 29, 2026.
1marathon upcoming
Seattlecity
November 29, 2026Next race
Marathon, Half marathon, Virtual, Kids' Rundistances
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Planning notes for Seattle, Washington, United States
Use this city page to shortlist 1 upcoming race by date, distance, registration path, and official source.
- Next raceUW Medicine Seattle Marathon & Half Marathon on November 29, 2026
- Busy monthsNovember (1)
- DistancesMarathon, Half marathon, Virtual, Kids' Run
- VerifyOpen each race page, then confirm details from its official, registration, course-map, or source link.