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Triathlon Calendar near Seattle 2026-2027

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

August 2026
Aug
15
Sa

Lake Meridian Triathlon

Triathlon Super sprint 0.25 16 3.1 mi Sprint 0.5 16 3.1 mi Sprint 0.5 16.4 3.1 mi Olympic 1.5 40 10 km
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..
Aug
22
Sa

The Kenmore Quad

Multisport Quad - Single Participant 0.25 6 1.6 1.3 mi Quad Relay - 2 Person 0.25 6 1.6 1.3 mi Quad Relay - 3 Person 0.25 6 1.6 1.3 mi Quad Relay - 4 Person 0.25 6 1.6 1.3 mi
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.
Aug
30
Su

Beaver Lake Triathlon

Triathlon Super sprint 0.25 4.3 mi Super sprint 13.4 4.3 mi Super sprint 0.25 13.7 4.3 mi
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.
September 2026
Sep
6
Su

Rattlesnake Lake Triathlon

Triathlon Super sprint 0.25 10 4 mi
Sprint triathlon at Rattlesnake Lake featuring a quarter mile swim, a mixed surface 10 mile bike, and a 4 mile run near North Bend.
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