Ultramarathons Near Seattle, WA
As of October 6, 2026, Crewable lists 30 upcoming ultramarathons near Seattle, WA from October 2026 to August 2027. The next is Defiance 50K / 30K / 15K on October 10 in Tacoma, WA. Registration is open for 5. One advertises prize money.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
With aid station data
2 aid
2 aid1 aid
1 aid
Race calendar
October 2026
7 racesNovember 2026
3 racesDecember 2026
3 racesFebruary 2027
2 racesMarch 2027
1 raceApril 2027
2 racesMay 2027
3 racesJune 2027
5 racesJuly 2027
1 raceAugust 2027
3 racesQuick answers
What is the next ultramarathon near Seattle, WA?
Defiance 50K / 30K / 15K, on Saturday, October 10, 2026, in Tacoma, WA. Distances: 50K, 30K, 15K.
What is the closest ultramarathon to Seattle?
2025 Seattle Ghost Marathon, Half & 50K in Seattle, WA, about 1 mile from Seattle, on November 28, 2026.
How many ultramarathons near Seattle, WA have open registration?
5 of the 30 list registration as open as of October 6, 2026, including Defiance 50K / 30K / 15K, Carkeek 12 Hour and Salt Creek 24.
Which ultramarathons near Seattle, WA offer prize money?
One race advertises prize money: Lord of the Hill ($250).
What is the busiest month for ultramarathons near Seattle, WA?
October 2026, with 7 of the 30. June 2027 follows with 5.
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