Italy- Centro Educazione sportiva / France - Fédération Française de Triathlon / A swimrun is a multiple-stage competition which involves participants running and swimming over a race course that involves multiple swim and run stages.

[7] In 2002, Anders Malm, the owner of Utö Värdshus (the finish line hotel of ÖtillÖ), his friend Janne Lindberg and some of his staff (the Andersson brothers) had a late night in the bar.

[8] In 2006, Michael Lemmel and Mats Skott were asked if they could make a commercial race out of their crazy challenge.

In 2014 on August 3, the first swimrun race done in warm water Results was Aquaticrunner XTriM ITALY and it started .

The objective of WSRF is to discipline, organize, promote, advance and spread out the sport of Swimrun throughout the wide world in Individual/solo and Team formula.

The scope is to promote and develop swimrun sport in the world in accordance with the principles set out by the Olympic Charter and in protection of physical and mental health of athletes, fighting doping in all its forms.

[21] The race covers 16 km of Cape Town coastline, with swims in the South Atlantic and running at the base of Table Mountain.

The event also carried out environmental actions before the race, collecting 100 kilograms (220 lb) of garbage in partnership with the Swedish Embassy in Brazil and with the local government.

Aquaticrunner was the third Solo World Championship with 20 nations represented and 240 athletes qualified in many countries (Fuerteventura, Madeira, Uruguay, Hungary, Belgium and Italy.

All the equipment that a participant starts with has to be carried all the way to the finish line, meaning swimming needs to be done with shoes.

The flotation equipment keeps the legs at surface meaning a good crawl position can be maintained without kick.

Given that swimrun takes place outside in natural surroundings, there are no standards in terms of how far the total run and swim should be.

SwimRun organisers are free to select suitable area's similar to cross-country races in running.

Swimrun organisors typically mention at least the total swim and run distance of their races so participants know if the event suits them.

Most organisors also provide details on the length of all individual run and swim segments for participants' further preparation.

While aquathlon — like triathlon — has a transition area with a spot for each participant to get their shoes and run clothes and leave a wetsuit or other swimming gear.

The world standard swimrun distances are divided into 6 types, in accordance with the majority of available races including ÖtillÖ.