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Seafair Triathlon

Sunday, July 25 @ 7:00 am - 4:00 pm

| Registration varies
Seafair Triathlon 1

Run, bike, swim

The Seafair Triathlon offers participants multiple disciplines on a flat, fast and picturesque triathlon course only 10 miles from Downtown Seattle in Issaquah. Taking place on the shores of Lake Sammamish at Lake Sammamish State Park, this participant friendly race course is a must do for all triathletes in the northwest.

The event offers participants a unique opportunity to participate in a sprint distance triathlon or super sprint distance in an urban setting. Swimming in warm, calm waters, riding in protected roadways and running through Lake Sammamish State Park, this is the Pacific Northwest’s premier triathlon.

Offering a Kids Triathlon as well, there is a distance for everyone in the family at the Seafair Triathlon! Join us in 2021 at the Seafair Triathlon with over 1,400 health enthusiasts taking part in the event.

See all of this summer’s Seafair events online.

Seafair Summer Fourth


Sunday, July 25
7:00 am - 4:00 pm
Registration varies
Event Tags:


Lake Sammamish
2000 N.W. Sammamish Road
Issaquah, Washington 98027
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