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 1,800 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 [email protected] and allow us to tailor a sponsorship package to fit your goals!

Seafair

Seafair is proud to host one of the northwest’s premier triathlons. With a goal of connecting community through athletics, festivals and community events we bring the northwest together. Spreading throughout King County and beyond we are excited to host you at Lake Sammamish and we can’t wait to see you at other events throughout the summer. For more information on the Seafair Festival, visit us at www.seafair.org

Blue70

Blue70 is proud to support the Seafair Triathlon community! Whether you’re gearing up for your first race or chasing a new personal best, make sure you’re ready for race day with gear trusted by athletes around the world. Offering wetsuits, swimwear, accessories, apparel and more. Blue70 offers all the products you’ll need to continue your triathlon journey. Visit blueseventy.com to save today.
Save 20% – Use the code 2026Seafairtri
*Code valid on all Blue70 products!

WAC

The WAC in Seattle is a private club and a community of individuals that come together through family and social events, fitness, networking and more