Everything you need to prepare for the biggest open water swim of your life. Expert guidance, structured plans, and a community that has your back from your first training session to the finish line.
TRAINING AND PREPARATION
Every registered swimmer receives access to UltraSwim 33.3's Preparation Programme. A structured 16-week training plan, detailed open water safety guidance, nutrition advice, and a private swimmers' community where you can connect with fellow participants, affiliate coaches and share your journey. Whether you are an experienced open water swimmer or completing your first event of this distance, we have built the tools to get you ready.
A progressive 16-week training plan calibrated for the 33.3km distance, designed for swimmers of all levels. Weekly volume targets, key sessions, and taper guidance built in.
Comprehensive open water safety guidance covering sighting, cold water acclimatisation, feed station protocol, and what to do if conditions change. World class safety operations on every edition.
What you eat before, during and after each stage makes a significant difference. Our nutrition guidance covers race day fuelling, hydration strategy, and how to practise your feed plan in training.
Technique guides covering open water specific skills: bilateral breathing, efficient sighting, drafting, and pacing over multiple days. Small improvements in efficiency add up over 33.3km.
Our network of affiliate coaches specialise in preparing swimmers for the 33.3km distance. Whether you prefer one to one sessions, group training weekends, or a residential swim camp at one of our event locations, our coaches understand what the race demands and how to get you ready for it. Find an affiliate coach in your region or join one of our residential swim camps to fast track your preparation.
Join the swimmers who cross the finish line of an Epic Adventure Swim Race. Download your preparation guide and take the first step.
Prices and PackagesAll our events so far have won awards. See reviews from other swimmers.
Explore our eco conscious clothing and swimwear, available exclusively to 33.3 participants. Everything is pre order only and delivered to you on site at your next event, ready at registration. Choose your event at checkout.
2027 swimmers can browse now and pre order from December 2026.