Say YES! to Life Swims Say Yes! to Life Swims: Discover the Joy of Open Water Swimming

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The OctoChallenge


Say Yes to Life Liability Waiver/Safety Plan.
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One of Seattle’s favorite swims! Challenging and fun, this event fills fast.

How to Participate

Have you completed a 5k recently, or will you do so this season? If so, the OctoChallenge has your name on it.

Criteria: All OctoChallenge registrants must complete at least one swim of 5k or longer by August 12th, 2024. Guila must receive proof of completion (via GPS screenshot, competition result, observer notes, or truthful statement) by August 12th, 2024.

Registration closes at midnight Wednesday, August 13, or when all spaces are filled. Register early to secure your place.

Date: SUNDAY, August 18th
Time: 9:00 AM – 2:00 PM
Cost: $175 Includes OctoChallenge medal

Although we supply extraordinary, trained safety craft, we also ask that swimmers provide their own paddlers when possible.


7:30 pm PT, Thursday, August 15th

You must participate in this meeting in order to swim. Please factor this requirement into your decision to register.


Location: Lake Washington
Length: 8k (approximately 5 miles)
Level: Challenging. Please register only if you are confident in your ability to swim the entire distance. There is a 4.5 hour cutoff; for safety reasons we will pick up swimmers who have not finished by 2:00 pm.
Water: Fresh
Wetsuit: Your choice to wear one or not

See a complete list of events.

Save $25 with a Swim Series

The Intrepid Swim Series includes the Tubby Trout 5K in addition to The OctoChallenge. Build your endurance with these sequenced events while saving money. (You can also pay less with additional discount options.)

Waiver/Safety Plan

To swim with us, you must read and agree to the Say Yes to Life Liability Waiver/Safety Plan.

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