Seafair Triathlon

About the Event

Welcome to the Seafair Triathlon!

Seattle's only triathlon will once again take place on the shores of Lake Washington at Seward Park. Offering participants multiple disciplines on a flat, fast and picturesque triathlon course in the shadows of downtown Seattle. This race is a must do for all triathletes in the northwest.

The event offers participants a unique opportunity to participate in a sprint distance triathlon or super sprint distance in an urban setting. Swimming in a protected cove, riding on closed roadways and running through Seward Park, this is the Pacific Northwest's premier triathlon.

Offering a Kids Triathlon as well, there is a distance for everyone in the family at the Seafair Triathlon! Join us in July for the Seafair Triathlon with over 1,800 health enthusiasts taking part in the event.

Races Offered

2 Person Sprint Relay

Jul 19, 2026

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Distance — 2 Person Sprint Relay

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Type — Multisports

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07:00

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$90.00

3 Person Sprint Relay

Jul 19, 2026

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Distance — 3 Person Sprint Relay

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Type — Multisports

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07:00

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$95.00

Sprint Duathlon

Jul 19, 2026

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Distance — Sprint Duathlon

terrain

Type — Multisports

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07:00

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$70.00

Sprint Triathlon

Jul 19, 2026

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Distance — Sprint Triathlon

terrain

Type — Multisports

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07:00

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$85.00

Super Sprint Triathlon

Jul 19, 2026

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Distance — Super Sprint Triathlon

terrain

Type — Multisports

timer

07:00

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$85.00

Kids Triathlon - Long Course

Jul 19, 2026

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Distance — Kids Triathlon - Long Course

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Type — Multisports

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11:00

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$30.00

Kids Triathlon - Short Course

Jul 19, 2026

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Distance — Kids Triathlon - Short Course

terrain

Type — Multisports

timer

11:00

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$30.00

Weather History

These values represent the 3-year monthly averages for July in Seattle.

thermostat Temperature

14.6° / 25.8°

wb_sunny Feels like

13.5° / 24.0°

light_mode Avg sunshine hours

13h 24m

water_drop Avg rainfall

0.3 mm

ac_unit Avg snowfall

—

air Avg wind speed

9.8 km/h (Light breeze)

opacity Sweat loss rate

High

terrain Course conditions

Hard and dry surface

sunny Max UV Index

Moderate (5.6)

humidity_mid Humidity

62.7%

wb_twilight Sunrise

05:29

nightlight Sunset

21:00

About Seattle

Learn more about the host city, Seattle.

Seattle, Washington sits at one of the most beautiful spots in the United States. Occupying a narrow isthmus between the Puget Sound and Lake Washington, it is the biggest city in the Pacific Northwest, with 780,000 people in Seattle and over four million people in the metro area. Seen from above, carpets of evergreen trees, pristine blue waters, and snowy white mountains surround the downtown's metallic skyscrapers, earning the city its nickname The Emerald City.