Washington
Washington Triathlon Calendar 2026-2027
Monthly updates for Washington
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Explore the best triathlons in Washington for 2026-2027! Our updated list features 22 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.
Join the Spring Classic Duathlon, Half Marathon, 10K and 5K at scenic Vancouver Lake on April 26, 2026, with in person and virtual entries for individuals and relays. Flat fast courses, tech shirt and medal, post race meal and beer while supporting A..
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.
Race the 31st Onion Man Triathlon at Bennington Lake on May 17, 2026: Olympic distance 1.5K swim, 40K rolling bike and 10K run. Individual, relay and aquabike options, 300 athlete cap, and a post race meal with a free beer.
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.
Swim, run and climb across scenic Orcas Island in ÖTILLÖ's swimrun at Rosario Resort Beach House. Enjoy a fierce race and a laid back finish with food, drinks and island views for teams or solo racers.
Take on the Medical Lake Triathlon at scenic Medical Lake Park with Super Sprint, Sprint, and youth Splash n Dash for ages 7 to 15. USAT sanctioned with one day memberships available, water safety, music, a forged finishers medal and custom T shirt.
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.
A multi-distance triathlon at Cascade Lake Beach on June 7, 2026, with super sprint and sprint courses, relay options, and a youth Splash n Dash; timing records swim, bike, run, two transitions and overall.
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.
Take on the Black Diamond Triathlon on Saturday, June 27, 2026 at Nolte State Park, with Olympic, Sprint, AquaBike and more around Deep Lake and rolling rural roads. All finishers get a medal, tee and hot meal in a friendly community atmosphere.
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..
Scenic Columbia River Triathlon in Vancouver WA offers a weekend of triathlon, runs and multisport events with views of Mt Hood and Mt St Helens. Races for all levels include kids, sprint and Olympic distances, relays and virtual options.
Celebrate the 28th annual Girlfriends Triathlon and Fitness Festival on August 9, 2026 at Frenchman's Bar Park in Vancouver WA. Enjoy scenic Columbia River and mountain views while choosing from sprint races, relays, a kids tri and a Friday sunset 5K..
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.