Seafair Triathlon
Jul 19, 2026
Seattle, WA
Sprint/YouthDistance
Sprint
Distance
Super Sprint
Distance
Youth
Event Details
About the race
"Every athlete starts somewhere. Start here."
"Bring your training to one of the most scenic places in WA."

Welcome to the Seafair Triathlon! Seattle's only triathlon will once again take place on the shores of Lake Washington at Seward Park. Offering participants multiple disciplines on a flat, fast and picturesque triathlon course in the shadows of downtown Seattle. This race 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 a protected cove, riding on closed roadways and running through Seward Park, this is the Pacific Northwest's premier triathlon.
Race Organizer
Training Phase
13w to goBuild
Add race-pace intervals. Begin brick workouts (bike-to-run transitions).
BaseBuildPeakTaperRace
Frequently Asked Questions
New to triathlon?
Our Triathlon 101 guide covers everything you need to know before your first start line.
Triathlon 101Full NWS Forecast
Finish Time Calculator
Swim (750m)15m 00s
T13m 00s
Bike (20km)40m 00s
T22m 00s
Run (5km)30m 00s
Estimated Finish1h 30m 00s
Sprint/Youth distances · meters, km/h, km
Event locations
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Race-Day Gear
0/18
Swim0/5
Bike0/6
Run0/5



