Seafair 2024 Triathlon. Winning the apollo mechanical cup hydroplane race is the goal of every team competing in the world’s fastest racing boats, and there is no better place or time to host that competition than the iconic seafair festival weekend. Mark your calendars for sunday, july 20, 2025 for next year’s event.

We have a fantastic day hosting you at seward park for the annual seafair triathlon. Seattle’s only triathlon will once again take place on the shores of lake washington at seward park.