Seafair Triathlon

Seafair Triathlon The Seafair Triathlon, taking place the 3rd weekend in July, features a Sprint, Super Sprint, & Kids Tri. There's something for all!

Screenshots save lives. Okay... at the very least race mornings. Here's your course maps for race weekend! Save 'em now...
07/16/2026

Screenshots save lives. Okay... at the very least race mornings.

Here's your course maps for race weekend! Save 'em now, thank yourself later, and spend race morning looking confident instead of asking, "Wait... where do I go?"

See you at the start line.

Race weekend is almost here!Your friendly reminder to grab your packet, get body marked, and get ready to RACE.Saturday ...
07/15/2026

Race weekend is almost here!

Your friendly reminder to grab your packet, get body marked, and get ready to RACE.

Saturday at Seward Park from 12:30–4:30 PM, or bright and early Sunday before 6:30 AM.

Basically: get your stuff, get your numbers, and we'll see you at the start line. LET'S DO THIS.

2026 SEAFAIR TRI IS HEADING FOR A SELLOUT! We are running out of room. Like...literally. Each distance has its own capac...
07/14/2026

2026 SEAFAIR TRI IS HEADING FOR A SELLOUT!
We are running out of room. Like...literally.

Each distance has its own capacity, so if registration says CLOSED, that category is currently SOLD OUT. Occasionally a spot sneaks back in when someone defers or withdraws, and those spots are first come, first served. Fast fingers, friends.

On Thursday, July 16: Sold-out categories will officially close and will not reopen.

Still thinking about racing? The universe has sent you a sign. It's this post. REGISTER. 😂🔥

Miss us this year? 2027 registration opens in February. We recommend setting an alarm, a calendar reminder, and possibly assigning a responsible adult to supervise you.

http://sea-tri.com

If you look close enough, you can ALMOST see your self here, post race. July 19 is almost here.
07/10/2026

If you look close enough, you can ALMOST see your self here, post race.

July 19 is almost here.

Some people count down to vacations.We count down to voluntarily swimming in open water.http://sea-tri.com ...
07/07/2026

Some people count down to vacations.
We count down to voluntarily swimming in open water.

http://sea-tri.com

If your bike is cleaner than your kitchen...You're probably ready.http://sea-tri.com
07/05/2026

If your bike is cleaner than your kitchen...
You're probably ready.

http://sea-tri.com

We cannot guarantee a PR.We can guarantee you'll hear at least one cowbell that makes you feel like an Olympian.See you ...
07/03/2026

We cannot guarantee a PR.

We can guarantee you'll hear at least one cowbell that makes you feel like an Olympian.

See you soon, Seattle.

http://sea-tri.com

You know what sounds like a good idea?Swimming.Then biking.Then running.All before most people finish brunch.http://sea-...
07/02/2026

You know what sounds like a good idea?
Swimming.
Then biking.
Then running.
All before most people finish brunch.

http://sea-tri.com

Is it too soon to start warming up?? It IS July 1st. See you SOON, triathletes. http://sea-tri.com ...
07/01/2026

Is it too soon to start warming up??

It IS July 1st.

See you SOON, triathletes.

http://sea-tri.com

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5898 Lake Washington Boulevard S
Seattle, WA
98118

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