EPIC ADVENTURE SWIM RACES™
BUT SO MUCH MORE THAN JUST A RACE.
Join an amazing community of like-minded, incredibly diverse set of swimmers from all over the world for the adventure of a lifetime. The iconic English Channel distance of 33.3km, spread across 6 swims over a long weekend, with world class safety cover, in breathtaking locations, based in luxury hotels with professional support and services.
2025 PLACES ARE LIMITED AND FILLING UP FAST! NEXT EVENT CROATIA IN MAY (and now with an ULTIMATE ultra-marathon option)! No reason to wait to book your spot with our super flexible rollover conditions - 2024 events sold out 6-9 months before - Reserve Your Spot Now!
Subscribe to get the latest updates here PLUS ACCESS TO OUR NEW FREE 80 page Endurance Swimmers magazine called ‘FLOW’!
A new category of open water swim event
Step out of your comfort zone with UltraSwim 33.3
“Hits that sweet spot between challenge and achievability”
Croatia, Greece and Montenegro (more coming…watch this space!)
UltraSwim 33.3 offers competent swimmers the opportunity to challenge themselves with the iconic 33.3km distance of the English Channel, spread over 5-7 point to point swims, during a 4-day long weekend based in amazing hotels across a variety of stunning European locations.
Each UltraSwim 33.3 event is different, but there are a few things we can guarantee at each: world-class safety and event management, luxury spa hotels, a comprehensive preparation programme, and premium support services - we’ve got your back and we’re here to help you swim like a pro. But it will still come down to you, physically and mentally, to accomplish your dreams and become your best self. You’ll quickly find your tribe and the group energy unique to this format will carry you through the toughest moments, and you’ll almost certainly return home a better swimmer, maybe even a better version of yourself and without doubt with many new friends.
Choose your distance
The CLASSIC
33.3
The big one!
*BUILD
22.2
Build the distance
*DISCOVERY
11.1
An introduction
2. Choose your service package
ULTRA
Dive into the
essentials
ULTRA+
RECOMMENDED
Choose [4*] or [5*]
ULTRA++
Our luxury concierge service
*11.1 BUILD and 22.2 DISCOVERY options are limited to a maximum of 10 spots per event. Our recommendation is to give the full 33.3 a go and just do what you can! But the 11.1 and 22.2 formats are available nonetheless at most venues if you really don’t want to go direct to the 33.3 (you’ll be amazed at what you can actually achieve!).
For those that don’t think a 10km marathon swim on day3 is enough for them (yes they exist!), then at #7Croatia only you can also challenge yourself (in limited numbers!) to the new ULTIMATE optional extra - a straight 33.3km or 22.2km on day2 or 3 - whilst enjoying the rest of the event as your warmup or swimdown!
Our swimmers range from 14 to 74 years old - median age of 50 at most events, and more women than men in 2024!
Come as a couple or family by adding on our F3 (Friends, Family and Fans) activity and transfer package. Your loved ones can get involved in the event as much as they want, or simply make the most of a great location. The race is usually all done by lunchtime every day! “I felt so included and really part of every step of the experience” Estefanía, #2Montenegro 2023
Subscribe to get the latest updates here PLUS ACCESS TO OUR NEW FREE 80 page Endurance Swimmers magazine called ‘FLOW’!
ULTRASWIM 33.3 IS OCEAN POSITIVE
“We’ve measured every aspect of our event footprint, and seek to reduce our impact wherever possible in all our choices - whats left after that we compensate with Sustainable Surf’s Sea Trees programme Ocean Positive - a combination of accredited CO2 sequestration projects plus additional mangrove forest plantations in Kenya in particular”. Read more about our overall sustainability strategy and actions HERE
“Hands down the best open water event I've participated in. The level of professionalism and attention to detail was the best I've seen, equal to any world-class event out there.”
Jay P, Australia
“I have never experienced anything like it. The camaraderie, the support, the sense of community”
Eric R, Dubai
“a profoundly enjoyable, incredibly moving and rewarding experience, I felt so cared for and looked after”
Alex N, UK
DOWNLOAD OUR
PACKAGE INFORMATION
Join us on Strava
Whether you are a participating or not - in the 6 months leading up to the next event we’ll publish each week a pick of the best 33.3 training sessions.
