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Interested in a 2027 Lake Tahoe Marathon Swim date?
Questions? Please review our Frequently Asked Questions section or contact us.
Marathon Swimming. Independently Observed.
We exclusively pilot marathon and ultramarathon swim attempts conducted under Lake Tahoe Open Water Swimming Association (LTOWSA) rules. Every attempt requires an independent observer assigned by LTOWSA.
No assistance, including wetsuits or neoprene, is permitted. LTOWSA observer and ratification fees are additional to our piloting fees.