Washington
Washington Triathlon Calendar 2025-2026
Monthly updates for Washington
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Explore the best triathlons in Washington for 2025-2026! Our updated list features 13 exciting races across the region. Find your next race in Washington below and join the running community at these great events!
April 2026
Test your early season fitness at the Pinnacle Peak Duathlon in Enumclaw, WA. This chip timed run bike run on mostly flat farm country roads features a small field and low frills for a focused, fast race day.
Experience a fast, flat race at Vancouver Lake along the Columbia River with duathlon, half marathon, 10K and 5K plus virtual options. All abilities welcome, on course support and parking included, with proceeds benefiting Ainsley’s Angels.
May 2026
Race the Cedar River Triathlon at Lake Wilderness in Maple Valley, WA on May 10, 2026 in a scenic super sprint swim bike run with wetsuits welcome. Finishers earn a Cedar River medallion and a kids Splash n Dash brings family fun.
Join the USAT sanctioned Medical Lake Triathlon on May 23, 2026, featuring Super Sprint and Sprint distances plus a Splash n Dash for ages 7 to 15. Enjoy a lake swim, flat bike and run courses, postrace food, custom shirt and finisher medal.
Experience the unique challenge of OTILLO Swimrun on scenic Orcas Island, combining open water swims and trail runs around Eastsound on May 31, 2026. Team and solo entries include World Series distances eligible for ranking points.
Experience ÖTILLÖ Swimrun on Orcas Island: scenic lake swims, forest trail runs and mountain climbs around Moran State Park. Choose from sprint to longer World Series courses and race across rugged island terrain with ocean views.
June 2026
Push your limits at the Columbia River Half Iron in Vantage WA on June 14 2026: a scenic swim, rolling bike and finish run with a finisher medal. Solo and relay entries welcome on this challenging Columbia River course.
Race the Black Diamond Triathlon on June 27, 2026 at Nolte State Park in Enumclaw. Swim Deep Lake, tackle scenic rolling bike and run routes, choose from multiple distances and celebrate with a finisher tee, medal and hot meal.
July 2026
Experience the Columbia River Triathlon weekend for multisport races, 5K and 10K runs, a kids triathlon and virtual options. Enjoy riverfront courses with Mt Hood and Mt St Helens views and parking included.
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..
Celebrate the 28th annual Girlfriends Triathlon & Fitness Festival in Vancouver Washington on August 2, 2026, an event for women with sprints, relays, aquabike, paddle tri, a 5K and virtual options. Flat courses and Columbia River and mountain views..
September 2026
IRONMAN 70.3 Washington Tri Cities in Richland offers a downriver swim, a rolling 56 mile bike through vineyards, and a flat 13.1 mile run along Columbia River waterfront. Enjoy a scenic finish at Columbia Point Park and nearby wineries.
Take on The Big Hurt in Port Angeles, a four part multisport challenge featuring mountain biking, kayaking, road cycling and a waterfront 10K run. Compete solo in Iron Division or team up while supporting the Olympic Discovery Trail.