Seattle
Triathlon Calendar near Seattle 2026-2027
Monthly updates for Seattle
Get new running races (and updates) in your inbox every month.
Explore the top triathlons near Seattle for 2026-2027! We've gathered 6 exciting races in the area. Check out our detailed list below to find your next local race.
May 2026
Cedar River Triathlon at Lake Wilderness offers a super sprint and kids Splash n Dash. It features a quarter mile swim and a scenic 14 mile bike and run on the Cedar River Trail, with a long sleeve tee and forged finisher medallion.
June 2026
Join the 20th anniversary Lake Wilderness Triathlon on June 6, 2026 at Lake Wilderness Park. Choose from Olympic and Sprint triathlons, a half marathon, 10K, 5K, relays and a duathlon while supporting local charities.
July 2026
Seafair Triathlon at Seward Park in Seattle features sprint, super sprint, relay, duathlon and kids races with a protected cove swim, bike on closed roadways and a single-loop park run.
August 2026
Race the 17th annual Lake Tye Triathlon at Lake Tye Park in Monroe WA on August 1, 2026, with triathlon, duathlon and aquabike options for all ages and abilities. Expect finisher medals, giveaways, post race food and awards in a scenic lakeside setti..
Dive into Lake Meridian Triathlon at Lake Meridian Park in Kent for Olympic, Sprint and Super Sprint distances plus team relays. Family friendly venue, finishers receive medals and enjoy a lively post race celebration with awards and food.
Race the Beaver Lake Triathlon on Aug 30 in Sammamish, a super sprint with a lake swim, a hilly bike that climbs Duthie Hill, and a flat run through forested streets. Pre race pasta, live music and post race awards add local flair.