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 10 exciting races across the region. Find your next race in Washington below and join the running community at these great events!
September 2026
A Richland, Washington triathlon with a downriver Columbia River swim, a 56 mile bike through vineyards, and a flat 13.1 mile run finishing at Columbia Point Park.
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.
Experience a triathlon featuring a 1.2 mile swim in the Columbia River, a hilly 56 mile bike ride, and a flat 13.1 mile run finishing in Vantage.
June 2027
USAT sanctioned half iron triathlon at Vantage Boat Launch with a 1.2 mile swim, 56 mile bike and 13.1 mile run, plus relay and virtual options.
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.
Monthly updates for Washington
Get new running races (and updates) in your inbox every month.
Seattle Solstice Run at Magnuson Park features a USATF certified 5k loop with 5k, 10k, 15k, a kids dash and a duathlon.
Lake Padden Triathlon at Lake Padden Park offers two chip timed courses with swim, bike, and run legs, revised bike routes, and an entrant limit of 325.
August 2027
Experience a multisport event in Sammamish featuring a lake swim, a scenic bike ride past Mount Si, and a flat run through forested trails.
September 2027
Experience a USAT sanctioned sprint triathlon in Bellevue featuring a swim in Lake Washington and a scenic bike ride along the EASTRAIL trail.
October 2027
USAT duathlon at Soaring Eagle Trailhead in Sammamish featuring a hilly 10 mile road bike followed by a 5 mile technical trail run with shirts and finisher medals.