EPIC ADVENTURE SWIM RACES™
SO MUCH MORE THAN JUST A RACE.
THIS IS NOT FOR EVERYONE, BUT EVERYONE CAN DO IT!
FLASH NEWS - 2026 calendar will be revealed on 4 April - and entries open!
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 5-7 swims over a 4 day long weekend, with world class safety cover, in breathtaking locations, based in luxury hotels with premium services and pro support from the day you enter. Exactly 150 years on from Captain Matthew Webb’s epic English Channel crossing in almost 22 hours (doing breaststroke), it’s YOUR chance to become a 33.3’er - albeit in much nicer conditions!
Potentially life-changing. Certainly epic! New friends for sure.
LATEST NEWS - FINAL PLACES NEXT EVENT #7CROATIA IN MAY (inc new ULTIMATE 22.2/33.3 option) - #8SWITZERLAND SOLD OUT - #9GREECE WAITING LIST ONLY - #10MONTENEGRO SPECIAL OFFERS, DISCOUNTS AND PRIZES - #6VIRTUAL WIN A FREE ENTRY - started but YOU CAN STILL ENTER!
No reason to wait to book your spot with our super flexible rollover conditions.
Subscribe to get the latest updates plus FREE ACCESS to FLOW magazine.
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”
In amazing Croatia, Switzerland, Greece and Montenegro
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
CLASSIC
33.3
The Classic!
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
Our swimmers range from 14 to 74 years old - median age of 50 at most events, and slightly more women than men! Most come alone (but go home with friends for life!), many come in groups/clubs.
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
Download for 2026: Full information pack, or Benefits and Pricing in PDF or (in Excel)
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
Whether you are a participating or not, get free tips, advice and training session inspiration! Join our Club.
