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 15 exciting races across the region. Find your next race in Washington below and join the running community at these great events!
October 2026
Pumpkin Man pairs a hilly 10 mile road bike up Duthie Hill with a 5 mile technical trail run at Soaring Eagle Trailhead; includes a long sleeve technical shirt and finisher medal.
December 2026
A USAT sanctioned winter triathlon at Lake Sammamish with a 1/4 mile swim in 47°F water, a 10 mile bike and a 5k trail run plus hot coco at the finish line.
May 2027
A multi-event spring race in Vancouver offering individual and relay duathlons plus half marathon, 10K and 5K on a flat course around Vancouver Lake Regional Park.
Onion Man Triathlon in Walla Walla offers an Olympic distance race with a 1.5 km swim, 40 km bike and 10 km run, capped at 300 participants.
June 2027
Triathlon, duathlon and running events at Lake Wilderness Park featuring lake swims, rolling bike routes and trails along the Cedar River.
Monthly updates for Washington
Get new running races (and updates) in your inbox every month.
USAT sanctioned Half Iron triathlon in Vantage 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.
Seattle Solstice Run at Magnuson Park on June 19, 2027 features 5k, 10k, 15k, a kids dash and a duathlon on a USATF certified 5k loop.
A chip-timed triathlon at Lake Padden Park offering sprint and super sprint distances, revised bike routes, participant limits, and on-site measures to protect the lake.
July 2027
A summer weekend triathlon festival on the Columbia River featuring sprint and Olympic triathlons, duathlons, AquaBike, sunset 5K and kids races.
An all women triathlon and fitness festival on July 11, 2027 at Frenchman's Bar Regional Park in Vancouver WA featuring sprint multisport races, relays and a 5k.
USAT sanctioned triathlon at Wildcat Lake on July 18, 2027 offering individual and relay distances with included long sleeve race T shirt, sticker and cap.
August 2027
Beaver Lake Triathlon combines a 1/4 mile swim, a 13.4 mile bike up Duthie Hill and a 4.3 mile run around Beaver Lake, with multiple race and relay options.
September 2027
Sprint triathlon at Newcastle Beach Park with a 1/4 mile swim, 13k off road bike and 8k run; USAT membership is required.
IRONMAN 70.3 Washington Tri-Cities features a downriver swim in the Columbia River, a rolling bike through vineyards and a flat riverfront run finishing at Columbia Point Park.