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Triathlon Calendar near Renton 2026-2027

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Explore the top triathlons near Renton for 2026-2027! We've gathered 4 exciting races in the area. Check out our detailed list below to find your next local race.

September 2026
Sep
6
Su

Rattlesnake Lake Triathlon

Triathlon Sprint 0.25 8 5 mi
Sprint triathlon at Newcastle Beach Park featuring a 1/4 mile Lake Washington swim, an 8-mile mixed road/trail bike, and a 5-mile asphalt run.
Sep
6
Su

Newcastle Beach Triathlon

Triathlon Sprint 0.25 8 5 mi
Sprint triathlon at Newcastle Beach Park on Sep 6 2026 with a 1/4 mile swim in Lake Washington, an about 8 mile mixed-surface bike, and a 5 mile asphalt run.
June 2027
Jun
19
Sa

Solstice Run - Seattle

Duathlon 5 km 10 km 15 km
Seattle Solstice Run at Magnuson Park features a USATF certified 5k loop with 5k, 10k, 15k, a kids dash and a duathlon.
October 2027
Oct
2-16
Sa

Duthie Hill Duathlon

Duathlon FULL Duathlon 10mi Bike 5... 10 5 mi RELAY 10 mile bike or 5 M... 10 5 mi
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.
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