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Seafair Triathlon

Sun July 19, 2026

Sprint Triathlon

Sprint Distance Triathlon – 0.5 mile swim, 20K bike ride, 5 Kilometer run
Start Time:
7:00am PDT
End Time:
12:00pm PDT
Registration:
Online Registration is Closed

The Seafair Triathlon is officially sold out! At this time, registration for the 2026 event is now closed and will not be re-opened. For all still hoping to participate, we will open registration for the 2027 event in early February- we hope to host everyone at next year's event!

Super Sprint Triathlon

Super Sprint Distance Triathlon – 0.25 mile swim, 20K bike ride, 5 Kilometer run

Start Time:
7:00am PDT
End Time:
12:00pm PDT
Registration Limit:
40 spots left.
Registration:
Online Registration is Closed

The Seafair Triathlon is officially sold out! At this time, registration for the 2026 event is now closed and will not be re-opened. For all still hoping to participate, we will open registration for the 2027 event in early February- we hope to host everyone at next year's event!

3 Person Sprint Relay

Sprint Distance Relays – Same as the sprint course
Start Time:
7:00am PDT
End Time:
12:00pm PDT
Registration:
Online Registration is Closed

The Seafair Triathlon is officially sold out! At this time, registration for the 2026 event is now closed and will not be re-opened. For all still hoping to participate, we will open registration for the 2027 event in early February- we hope to host everyone at next year's event!

2 Person Sprint Relay

Sprint Distance Relays – Same as the sprint course
Start Time:
7:00am PDT
End Time:
12:00pm PDT
Registration:
Online Registration is Closed

The Seafair Triathlon is officially sold out! At this time, registration for the 2026 event is now closed and will not be re-opened. For all still hoping to participate, we will open registration for the 2027 event in early February- we hope to host everyone at next year's event!

Sprint Duathlon

Sprint Duathlon – 20K bike ride, 5 Kilometer Run
Start Time:
7:00am PDT
End Time:
12:00pm PDT
Registration Limit:
13 spots left.
Registration:
Online Registration is Closed

The Seafair Triathlon is officially sold out! At this time, registration for the 2026 event is now closed and will not be re-opened. For all still hoping to participate, we will open registration for the 2027 event in early February- we hope to host everyone at next year's event!

Kids Triathlon - Long Course

Kids Long Course – 100-yard swim, 2-mile bike ride, 1-mile run
Start Time:
11:00am PDT
End Time:
12:00pm PDT
Registration Limit:
Sorry! This event is full.
Registration:
Online Registration is Closed

The Seafair Triathlon is officially sold out! At this time, registration for the 2026 event is now closed and will not be re-opened. For all still hoping to participate, we will open registration for the 2027 event in early February- we hope to host everyone at next year's event!

Kids Triathlon - Short Course

Kids Short Course – 50-yard swim, 1-mile bike ride, 0.5 – .75 mile run (swim in water kids can touch in)
Start Time:
11:00am PDT
End Time:
12:00pm PDT
Registration Limit:
5 spots left.
Registration:
Online Registration is Closed

The Seafair Triathlon is officially sold out! At this time, registration for the 2026 event is now closed and will not be re-opened. For all still hoping to participate, we will open registration for the 2027 event in early February- we hope to host everyone at next year's event!

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