Become a Sponsor

Are you interested in promoting your brand or business to health-conscious athletes in the King County area? The Seafair Triathlon hosts over 1,500 participants annually, including 200 kids triathlon participants. This is a great location to meet affluent, health-conscious families in one location.

For more information on how to participate in the Seafair Triathlon, please email us at and allow us to tailor a sponsorship package to fit your goals!