Trail Races & Ultramarathons Near Seattle, WA
As of October 6, 2026, Crewable lists 43 upcoming trail races and 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 8. One advertises prize money.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
With aid station data
2 aid
2 aid1 aid
1 aid
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Race calendar
October 2026
12 racesNovember 2026
5 racesDecember 2026
4 racesFebruary 2027
2 racesMarch 2027
3 racesApril 2027
2 racesMay 2027
5 racesTiger Claw
Issaquah, WA
June 2027
5 racesJuly 2027
1 raceAugust 2027
4 races5K FEST
Bonney Lake, WA
Quick answers
What is the next trail race or ultramarathon near Seattle, WA?
Defiance 50K / 30K / 15K, on Saturday, October 10, 2026, in Tacoma, WA. Distances: 50K, 30K, 15K.
What is the closest trail race or ultramarathon to Seattle?
SpiritWalk & Warrior Run 2026 in Seattle, WA, about 1 mile from Seattle, on October 10, 2026.
How many trail races and ultramarathons near Seattle, WA have open registration?
8 of the 43 list registration as open as of October 6, 2026, including Defiance 50K / 30K / 15K, SpiritWalk & Warrior Run 2026 and Carkeek 12 Hour.
Which trail races and ultramarathons near Seattle, WA offer prize money?
One race advertises prize money: Lord of the Hill ($250).
How many of the trail races near Seattle, WA are ultramarathons?
30 of the 43 are ultramarathons (longer than a marathon, or a backyard, timed or 200+ mile format). The other 13 are shorter races.
What is the busiest month for trail races and ultramarathons near Seattle, WA?
October 2026, with 12 of the 43. November 2026 follows with 5.
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