UltraSwim 33.3 offers you the opportunity to complete the iconic 33.3km distance of the English Channel,
spread over 5-7 swims, over a 4-day long weekend in stunning locations around the world.
This is not your average sporting event, swimming 33.3km is a challenge for any swimmer,
and our races take place in varied and challenging conditions that will push you to your mental and physical limits.
We can’t guarantee you’ll become a 33.3 Finisher the first time around, but we can guarantee you won’t regret taking part.
Join us at one of our events and discover a brand-new world of multi-day, point-to-point, open water swimming events…
and who knows, maybe you will take home the infamous 33.3 Finisher’s Droplet!
Prices are valid until 30 November 2024, after which there will be an increase - with our flexible rollover policy, better to enter now even if you are not 100% sure about your availability or event choice!
Where Adventure Meets Open Water Challenges
Explore Upcoming UltraSwim 333 Events
#7CROATIA
The ‘Islands’ Edition
Welcome to the sunniest place in Europe and the perfect way to start the open water swimming season in the northern hemisphere!
This racecourse takes swimmers between the two beautiful and ancient villages of Stari Grad (start) and Hvar Town (finish) via secret bays and stunning islands. What #3Croatia has to offer both above and below the water will blow you away.
The water temperature is expected to be between 17-20°C
16-19 MAY, 2025
Our recommended ULTRA+ package includes:
Entry for the 4-day event
Hotel 4* or 5* for 4 nights (based on double occupancy, single occupancy upgrade available)
Dedicated airport transfers
Pre-event coaching, preparation and support
Personal 1:1 video analysis
Breakfast and post-race refuel lunches included
Swimmers pack (dry bag, towel, water bottle…)
Post swim massages (Days 1-3)Preparation webinars and clinics
Optional family package (F3)
#9GREECE
The ‘Mamma Mia’ Edition
Welcome to the latest edition to our Epic Adventure Swim Race Series™, hosted on Greece’s greenest island, Skopelos - home also to the cult film Mamma Mia!
This racecourse takes us around the unspoilt wild coastlines, both exposed and sheltered from a regular strong north wind and of course, whether you love it or hate the film, passing the famous filming locations.
The water temperature is expected to be between 22-26°C
19-22 SEPTEMBER, 2025
Our recommended ULTRA+ package includes:
Entry for the 4-day event
Hotel 4* or 5* for 4 nights (based on double occupancy, single occupancy upgrade available)
Dedicated airport transfers
Pre-event coaching, preparation and support
Personal 1:1 video analysis
Breakfast and post-race refuel lunches included
Swimmers pack (dry bag, towel, water bottle…)
Post swim massages (Days 1-3)Preparation webinars and clinics
Optional family package (F3)
#10MONTENEGRO
The ‘Fjords to the Sea’ Edition
Welcome to the original UltraSwim 33.3 Epic Adventure Swim Race™ location - Montenegro.
One of the smaller countries of the Balkans, #10Montenegro’s racecourse offers both wild mountain backdrops and deep fjords, as well as rugged Adriatic coastline, producing a variety of conditions. Highlights include swimming through an abandoned submarine pen and the iconic Blue Cave.
The water temperature is expected to be between 18-22°C
3-6 OCTOBER, 2025
Our recommended ULTRA+ package includes:
Entry for the 4-day event
Hotel 4* or 5* for 4 nights (based on double occupancy, single occupancy upgrade available)
Dedicated airport transfers
Pre-event coaching, preparation and support
Personal 1:1 video analysis
Breakfast and post-race refuel lunches included
Swimmers pack (dry bag, towel, water bottle…)
Post swim massages (Days 1-3)Preparation webinars and clinics
Optional family package (F3)
