Washington
Washington Triathlon Calendar 2026-2027
Monthly updates for Washington
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in Washington for 2026-2027! Our updated list features 14 exciting races across the region. Find your next race in Washington below and join the running community at these great events!
August 2026
A one-day triathlon at Lake Meridian Park in Kent, Washington on August 15, 2026 offering Olympic, Sprint, Super Sprint and relay formats. Finishers receive medals and top age-group athletes earn pint glasses; race T-shirts are guaranteed for registr..
A non-competitive multisport event on Kenmore's waterfront combining a swim, bike, run and a paddle leg. Participants may enter solo or in relays up to four people; registration includes a t-shirt and entry into a prize drawing.
A one-day triathlon in Richland featuring Olympic and sprint distances plus 3-person relay divisions, with a river swim, looped bike and run courses, chip timing, limited field size, and online-only registration.
Beaver Lake Triathlon in Sammamish on August 30, 2026 features a 1/4-mile swim, 13.7-mile bike and 4.3-mile run with relay and youth options.
A multi-distance triathlon at Allan Yorke Park on August 30, 2026, with swim, bike, and run courses around Lake Tapps and Pierce County. The event serves as the RTB Summer Series finale and is part of the Trifecta Trident challenge.
Monthly updates for Washington
Get new running races (and updates) in your inbox every month.
A USAT sanctioned off-road triathlon at Lake Padden featuring an 800 m swim, a 9 km mountain bike loop, and a 4.1 km trail run. The event accepts solo racers and 2- or 3-person relays and includes a USAT one-day license.
September 2026
Sprint triathlon at Newcastle Beach Park with a 1/4 mile swim, an 8 mile mixed-surface bike, and a 5 mile asphalt run; relay and USAT one-day options available.
Sprint triathlon at Newcastle Beach Park on Sep 6, 2026 with a 1/4 mile swim, about 8 mile mixed surface bike and a 5 mile asphalt run.
USAT duathlon in Sammamish on September 19, 2026 featuring a 10 mile hilly road bike and a 5 mile technical trail run with long sleeve T Shirt and medal.
IRONMAN 70.3 Washington Tri-Cities in Richland WA features a downriver Columbia River swim, a rolling bike through vineyards and a flat riverside half marathon run.
A four-leg endurance event in Port Angeles combining mountain bike, kayak, 30-mile road bike and a 10K run with solo and team entries for ages 15 and up.
A full half iron triathlon at Vantage Boat Ramp with a 1.2 mile swim, 56 mile hilly bike, and 13.1 mile run plus relay and virtual options.
June 2027
A set of triathlon, duathlon, team relay, and 5K races at Waterfront Park in Medical Lake, WA, featuring an out-and-back open water swim and paved road and trail bike and run courses.
A chip-timed triathlon at Lake Padden Park on June 26, 2027, offering competitive and recreational swim-bike-run distances with course maps and a 325-person field limit.