Welcome to the Swim Across America – Seattle Open Water Swim.
Volunteer, swim a 1/2 mile, 1 mile or 2 mile distance to raise money that funds clinical trials and cancer research at the Fred Hutch Cancer Center. Over the last 16 years we’ve raised over $6 million, which has been granted to fund early stage research and clinical trials.

EARLY SWIMMER REGISTRATION! $50 NOW THROUGH MARCH 30, 2026.

ABOUT
Welcome to the Swim Across America – Seattle Open Water Swim! Established in 2009, SAA – Seattle has raised over $6 million for our beneficiary: Fred Hutch Cancer Center. You can find the most recent 2025 Impact Report here. For a more comprehensive look at current funding projects from Swim Across America and Fred Hutch, click here.

Each year we are proud to host over 600 swimmers and volunteers, spectators and supporters, as well as Olympians near and far at our charity swim. We look forward to seeing you on Saturday, September 12th at Lake Sammamish State Park Sunset Beach.

Whether you are a veteran swimmer or you’re looking to do your first open water swim, we welcome you to help us “Make Waves to Fight Cancer.”