2026 The Snohomish River Run Marathon, Half Marathon, 10K and 5K
Snohomish, WA
MarathonHalf Marathon+2
Open until Oct 12from $55
Marathons in Washington
As of October 6, 2026, Crewable lists 7 upcoming marathons in Washington from October 2026 to December 2026. The next is 2026 The Snohomish River Run Marathon, Half Marathon, 10K and 5K on October 11 in Snohomish. Registration is open for 4.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
Race calendar
October 2026
4 racesNovember 2026
2 racesDecember 2026
1 raceQuick answers
What is the next marathon in Washington?
2026 The Snohomish River Run Marathon, Half Marathon, 10K and 5K, on Sunday, October 11, 2026, in Snohomish. Distances: Marathon, Half Marathon, 10K.
How many marathons in Washington have open registration?
4 of the 7 list registration as open as of October 6, 2026, including 2026 The Snohomish River Run Marathon, Half Marathon, 10K and 5K, The Spokane Marathon and Tri-Cities Marathon.
What is the busiest month for marathons in Washington?
October 2026, with 4 of the 7. November 2026 follows with 2.
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