Seattle’s 10K Open Water Swim 2025
Swim a marathon distance on this event’s 6th anniversary! Seattle’s 10k Open Water Swim combines beauty and challenge into an unforgettable adventure.
Swimmers receive a medal and a Seattle 10k OWS sticker. All water safety volunteers receive their choice of champagne or chocolate.
Swimmers of all speeds participate. For safety reasons, there is a 6-hour cut-off. Support watercraft will pick up any swimmers still in the water after the six hour mark.
How to Register
We accept participants based on their RECENT open water swim experience. Preference is given to those who have swum 5k or further in the open water at least twice in the last two years. (Tubby Trout swimmers, this is your opportunity!) To receive the registration link, please contact Guila. Include qualifying details, such as data from your tracking device, course record, race results, etc. Also describe your training plans for this 10k event.
If you are accepted, Guila will provide the link to register, along with more information.
Note: Although we supply a core group of trained (and wonderful!) support paddlers, we also ask swimmers to recruit a designated paddler if possible. This increases the event’s overall safety and allows the swimmer to feed at regular intervals.
Registration for this event closes at midnight on Tuesday Aug. 19th, or when all spaces are filled.
Date: SATURDAY, August 23
Time: 9:00 AM – 3:00 PM
Cost: $195
MANDATORY SAFETY MEETING VIA ZOOM
7:30 pm PT, Thursday, August 21st
You must participate in this meeting in order to swim. Please factor this requirement into your decision to register. Meeting recording will not be available.
Details
Location: Lake Washington, Seattle. Details included in the Welcome Letter, which you will receive approximately two weeks before the event.
Length: 10k (Approximately 6.2 miles)
Level: Challenging. Please register only if you are confident in your ability to swim the entire distance.
Wetsuit: Your choice to wear one or not. Many swimmers get very cold spending this long in the water, so please be thoughtful about your choice.
The Vanquisher Swim Series!
Combine Seattle’s 10k with Tubby Trout. Save $20 and swim a total of 15k (9.32 miles). The Vanquisher Swim Series will test your limits while you have fun and save money.
Learn about our discount options.
See a complete list of events.
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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