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Northern California Open Water Swimming Association

Professional, unbiased non-profit open water swimming ratification

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    • Round-Trip Angel Island
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    • Crazy 8
    • Three Rocks 10km
    • Circumnavigation of San Francisco
    • Round-Trip Prison (San Quentin-Alcatraz)
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Observer Signup

Independent, unbiased verification of a marathon swim attempt is an important part of our sport. Ratified and certified swims attempts are accomplished this through the use of volunteer observers who are knowledgeable, trained, and objective in their interpretation of the rules, course descriptions, and the events that occur during swim attempts. Please join us!

The Northern California Open Water Swimming Association and Lake Tahoe Open Water Swimming Association provide a limited expense reimbursement to volunteer observers based on the course and swim being observed.

Copyright © 2023 Northern California Open Water Swimming Association is a 501(c)3 Non-Profit organization