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Mudskipper US Sammamish Open Water Swim - Seattle

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Issaquah, Washington, United States

calendar_today 26 Jul, 2026

About the Event

Conquer the pristine, clear waters of a Pacific Northwest gem. The Lake Sammamish Open Water Swim invites you to Sunset Beach on Sunday, July 26th, 2026, for a stunning 1K, 3K, or 5K challenge in the heart of Washington State. Set against the breathtaking backdrop of the Cascade Mountains, this event offers a smooth, current-free swim in the calm, inviting waters of Lake Sammamish State Park. Perfect for first-time open water enthusiasts and seasoned distance swimmers alike, the point-to-point courses provide a safe, professionally-timed experience with full medical and nutritional support. As part of the Mudskipper SwimRun series, it’s an ideal opportunity to test your endurance in a serene and spectacular setting. Dive into summer and make a splash in the Pacific Northwest's premier open water swimming event.

Races Offered

1K Open Water Swim

Jul 26, 2026

straighten

Distance — 1K

terrain

Type — Water sports

timer

08:00

3K Open Water Swim

Jul 26, 2026

straighten

Distance — 3K

terrain

Type — Water sports

timer

08:00

5K Open Water Swim

Jul 26, 2026

straighten

Distance — 5K

terrain

Type — Water sports

timer

08:00

Weather History

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

thermostat Temperature

13.5° / 26.7°

wb_sunny Feels like

12.9° / 26.0°

light_mode Avg sunshine hours

13h 13m

water_drop Avg rainfall

0.4 mm

ac_unit Avg snowfall

—

air Avg wind speed

7.0 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

65.8%

wb_twilight Sunrise

05:28

nightlight Sunset

20:58

About Issaquah

Learn more about the host city, Issaquah.

Issaquah is a city of 40,000 people (2019) in King County in the Puget Sound region of Washington State. Its historic downtown is a popular base for hiking in the foothills of the Cascades.