Triathlon Calendar near Black Diamond 2026-2027

December 2026

Triathlon Super sprint 0.25 10 mi 5 km

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.

April 2027

Apr

24

Sa

Duthie Hill Duathlon

Sammamish | 21 mi from Black Diamond

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

USAT duathlon near Soaring Eagle Trail head with a 10 mile hilly road bike and a 5 mile technical trail run, includes long sleeve tech shirt and finisher medal.

June 2027

Jun

5

Sa

Lake Wilderness Triathlon and Run

Maple Valley | 6 mi from Black Diamond

Trail Run Triathlon Duathlon Sprint 13.76 5.5 mi Sprint 0.25 13.76 5.5 mi Olympic 27.54 6.36 mi Olympic 0.93 27.54 6.36 mi

Triathlon, duathlon and running events at Lake Wilderness Park featuring lake swims, rolling bike routes and trails along the Cedar River.

Jun

19

Sa

Solstice Run - Seattle

Seattle | 25 mi from Black Diamond

Duathlon 5 km 10 km 15 km

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.

Jun

26

Sa

Black Diamond Triathlon

Enumclaw | 7 mi from Black Diamond

Triathlon Super sprint 0.25 13.7 2.8 mi Sprint 0.5 13.7 2.8 mi Olympic 1.5 40 km Olympic 1.5 40 10 km

Multisport event in Enumclaw with a swim at Deep Lake and bike and run courses through Ravensdale Selleck and Enumclaw farmlands.

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August 2027

Aug

29

Su

Beaver Lake Triathlon

Sammamish | 21 mi from Black Diamond

Triathlon Duathlon Aquathlon BLT Aquathon 1/4 swim, 13... 0.25 13.4 mi BLT Aquabike 1/4S, 13.4B 0.25 13.4 mi BLT Duathlon 13.4B, 4.3R 13.4 4.3 mi Full Triathlon1/4S 13.4B... 0.25 13.4 4.3 mi

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.