THE ‘ISLANDS’ EDITION
15-18 MAY 2026

#12CROATIA

Step out of your comfort zone with UltraSwim 33.3
33.3km (English Channel distance) spread over 4 days, 6 swims.
Welcome to your next big challenge.

Welcome to the sunniest island 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 Croatian waters have to offer both above and below the waterline will blow you away.
 
The water temperature is expected to be between 18-21°C

Unique to our Croatia event

  • Start and finish in different villages - two venues to discover in one event.

  • One of our two ‘island’ events - take in the island vibe…

  • Half Board/dinner allowance included in ULTRA package for first 3 nights

  • Simply perfect Relais&Chateaux Maslina Resort for ULTRA+[5*] and ULTRA++

  • ULTIMATE 22.2/33.3 - non-stop ultra marathon add-on option only in Croatia

  • Two channel crossings of 2.3km each planned

  • Town centre swim finish on final day - with your non-competing partner if they want for the final few hundred metres.

  • The longest daylight hours, 0530-2110

  • Pre-event preparation swim camp (2 days)

OUR HOST VENUE

The magical island of Hvar hosts our ‘early summer’ European kickoff. A region steeped in history, and populated by hundreds of beautiful islands of all sizes, our Croatian venue has it all.

This venue suits both the time-constrained swimmer wanting a fantastic long weekend 33.3km challenge, and also someone wanting a super holiday in this stunning region, with a rewarding challenge in the middle.

WHERE WILL WE SWIM?

This course takes us via secret bays and stunning islands, with potentially two 2.3km crossings thrown in and if the weather allows, a 11km+ marathon swim on the open sea side of the stunning Pakleni islands. Google Earth link indicative only.

SWIMMING CONDITIONS?

Mid-May in Hvar could deliver us anything, above and in the water - from crisp mornings to hot sun-baked afternoons, and according to the weather in the first part of May, 18-19°C water that could easily be heated by early summer sun to 20°C or more (and was in 2024!). With mid-summer only a month later, long daylight hours make this a super destination to put winter behind you! Wetsuit optional, but we had a lot of very happy skins swimmers in past events.

ONLY IN CROATIA

Big ultra-marathon swim challenges like the real English Channel and other iconic long swims can be very difficult to organise, often with long waiting lists or expensive solo organisation costs. Whether your aspiration is to take on something like the iconic English Channel swim in the future, or you relish the idea of a big straight swim, UltraSwim 33.3 in Croatia (ONLY) offers two fully managed options. Firstly a 33.3km single swim between the two stunning ancient 12th century villages of Stari Grad, and Hvar Town, circumnavigating the western end of Hvar Island. Plus a shorter version from Stari Grad to Stiniva Bay, totalling 22.2km. You’ll need to bring a support crew, but we provide the dedicated boat, skipper, planning and overall safety and medical support.

#12CROATIA Preparation Camp

Two day dedicated preparation camp immediately before #7 lead by world class experts from coaching, nutrition, physio. You’ll discover the race course, learn new open water skills, with pool time and seminars to complete what will be the ideal way to prepare for your UltraSwim 33.3.

Limited spaces!'

How to book

STEP 1

Choose your sporting format, select your support and accommodation package, and reserve your spot!

STEP 2

There is a 500€ advanced payment to secure your place, full refund within 30 days if you change your mind.

STE3

We’ll then discuss with you personally the options you might need like extra hotel nights, or upgrades.

The full amount due is payable up to 6 months prior to the event (or within 14 days if within 6 months) and in the case of changing circumstances we have a flexible rollover policy should you be unable to participate.

Better to secure you space now, knowing you can change later if you have to. If you book 2 or more events at the same time for the same year, you benefit from €100 discount with our PASSPORT offer.

  1. SELECT A SPORTING FORMAT

TIME TO CHOOSE!

CLASSIC

33.3

The Classic

The distance of the iconic English Channel spread over a long weekend. This is the main challenge. Push yourself and join the ranks of the 33.3 finishers! You will swim the entire 33.3km distance solo, over 5-7 swims, across 4 days, including a marathon 10km+ on day 3. Any determined open-water swimmer can do this!

BUILD

22.2

Build your distance

This is the perfect build-up to the iconic 33.3km distance. Many swimmers have doubts (despite often being more than capable) so the 22.2km BUILD option is often a great starting point. Day 3 will always be less than the full 10km marathon the 33.3ers will tackle.  See HERE an example of the BUILD 22.2 and DISCOVERY 11.1 plan.

DISCOVERY

11.1

An introduction

This option allows you to discover the magic of UltraSwim 33.3 without the pressure. You will swim a short 2-3km distance each day and get to know our event as you build towards the main 33.3km distance. However, our recommendation will always be to enter the the 33.3 CLASSIC and swim what you can each day - you might surprise yourself!

2. CHOOSE YOUR PACKAGE

ULTRA

Dive into the essentials
This is our standard stripped down but great package

Pricing:

PER PERSON

€1,800

*GROUP OF 4

4th swimmer half price!

All packages include:

  • Hotel (minimum 3*) 4 nights twin shared accommodation

  • ULTRA special bonus - €25 food/drinks voucher per day for the 3 nights in Stari Grad (only)

  • Transfers from Hvar town or Stari Grad ferry port to the hotel (make your own way from airport to Hvar Island)

  • Pre-event training plan and training support channel

  • Preparation webinars

  • Finish line refuel lunches (ex drinks)

  • Guided stretching sessions post race

  • Upcycled Participation and Finisher's medal

  • Swimmer’s Pack (towel, water bottle)

  • Tow float and bag loan (refundable €50 euro cash deposit to pay on collection)

  • Professional photos and video content

  • *Group of 4 = book at same time, including two new swimmers

ULTRA+ (4*)

Our recommended package
The premium experience our event is created around

Pricing:

PER PERSON

€2,600

In addition to ULTRA package benefits to the left/above, the ULTRA+ [4*] package includes:

  • Hotel 4* for 4 nights (shared accommodation, single occupancy available) 

  • Dedicated airport transfers all the way to Stari Grad hotel, and back to Split airport.

  • Personal 1:1 Video Analysis pre-event (you must provide the video)

  • Swimmer’s Pack (poncho, water bottle, woolly or sun hat, personalised dry bag)

  • Post race sports massage (days 1-3)

  • Top sports injury physio on-site injury assessment (fee if further services required)

  • Optional partner hotel and support package

  • Optional extra single occupancy

  • Half Board for the 3 nights in Stari Grad (only)

ULTRA+ (5*)

Our recommended package ULTRA+ but with significant hotel upgrade, as well as shared luxury villa options. Pricing:

PER PERSON

From €4,100

In addition to ULTRA & ULTRA+[4*] benefits, the ULTRA+ [5*] package includes:

ULTRA++

Everything super premium
This is everything taken care of, our luxury concierge service with all you can imagine included.

For the VIP experience, the ULTRA++ package, upgrades everything to a premium level. This all-inclusive package includes everything from partner boats and specialist coaching to luxury hotel accommodation, concierge service and dedicated support.

Email us for a personal consultation

PER PERSON

€7,500

F3 Partner supporter package

Share the love
This package enables your Friends, Family and Fans (F3) to share your journey enough to feel part of it, but not too much to bore you watching swimmers swim for hours!

Pricing

€450*

(accommodation and transfer package from €500)

Package will vary according to venue but usually includes:

  • Watch some of the swimming (but no too much!) by boat or bus - with more relaxed morning breakfast timings than your swimmer

  • Transport to finish line on days 1-3 to join swimmers for their refuel lunch (exc.drinks)

  • Local excursions may be added

  • Professional photos and video content for your use

  • Join your swimmer for welcome aperitif, and prize-giving ceremony

  • Access to on-site seminars and round tables

  • Dedicated host throughout

  • Aluminium water bottle (so you don’t use plastic!)

  • Drybag on loan (you might swim to shore!)

  • Option to join your partner for a few hundred metres of the (untimed) final swim!

TRAVEL AND LOGISTICS

Conveniently accessible via a fast ferry ride from the lively city of Split to Hvar or slower but direct ferry to Stari Grad where you’ll stay for the first 3 events nights. There’s also an option via equally charming Dubrovnik further down south if you have an extra day in your schedule, with a longer ferry up to Hvar (and US airlines fly direct). For optimal planning, arriving in Split by mid-morning on the 15th would be ideal, with departure flights feasible from the evening of the 19th. For a seamless experience, ULTRA+ offers private transfers directly from Split airport via high-speed vessels (weather permitting). Alternatively, extend your stay and soak up more of the enchanting surroundings at your leisure.
“Awesome event. Can’t fault any aspect. Absolutely flawless. Second time round, felt comfortable and at home with the ultra family. But still an exciting and challenging adventure. Mark and the team have created a unique event, where the focus on the vibe out of the water is as strong as in the water, so you feel part of the Ultra at any time. I really enjoyed the poolside chats and the post swim lunches in spectacular locations. Getting the chance to chat to swimming legends like Andy and Anna, and meeting so many other swimmers from all over the word. Being exposed to new swims and events, products and recommendations, networking in the adventure swimming world, and making new friends. A must do for any open water adventure swimmer, and a fantastic experience for non swimming partners as well. I’m hooked for life.”
— Elan, South Africa