Seafair Triathlon

Jul 19, 2026
Seattle, WA
Sprint/Youth
0Days
00Hrs
00Mins
00Secs
Register
Distance
Sprint
Distance
Super Sprint
Distance
Youth

Event Details

About the race

Seafair Triathlon
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.

Training Phase

13w to go
Build

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 101
Full 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

Race-Day Gear

0/18
Swim0/5
Bike0/6
Run0/5