Long aquathlons

Long aquathlons

Long distance aquathlon events | up to 13km swim + 20km run

Long aquathlons in the UK

The longest aquathlon in the world is a 13km sea swim followed by a 13km trail run so if you feel like taking on a serious feat of stamina without the expense of a bike, read on! Select your location for long distance aquathlons in your area or scroll down to see events coming up.

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Long aquathlons in 2024

Featured events are listed below - select your region to see all events.

Taking place across the scenic Thames Valley area. Swim the river and run the flat Thames path as part of an exciting multi-activity event for the summer.
  • Sun 14 Jul
  • £80
Marlow, Buckinghamshire, UK

The One on the River | Marlow | Middle Distance Aquathlon

Taking place across the scenic Thames Valley area. Swim the river and run the flat Thames path as part of an exciting multi-activity event for the summer.

  • 1900 m river swimming
  • 20 km trail running
  • Sat 8 Jun
  • £304
Windermere, Cumbria, UK

Great North SwimRun | Endurance

Teams of two can tackle six running sections and seven swim sections in this endurance course of the Great North SwimRun adventure.

  • 4060 m lake swimming
  • 34.77 km trail running
  • Sat 29 Jun
  • £29
Redruth, Cornwall, UK

Portreath Aquathlon - The Walrus | Olympic Walrus

Nestled in-between the high cliffs and harbour walls, calm and secluded beach at Portreath is the perfect venue for a multisport event.

  • 1500 m sea swimming
  • 10 km trail running
  • Sat 13 Jul
  • £165-£299
Pembroke, Pembrokeshire, UK

Wales SwimRun | Full Distance

Amazing location, blue flag beaches, being tied to your teammate... You won't want to miss it. Now with a new sprint distance perfect for first-timers!

  • 7 km sea swimming
  • 26 km trail running
  • Sun 1 Sep
  • £62-£70
Grantham, Leicestershire, UK

Belvoir Castle Triathlon/Aquathlon/Aquabike | Middle Distance Aquathlon

Held at the impressive, special and statuesque venue. Belvoir Castle. An atmospheric, iconic gem.

  • 2 km lake swimming
  • 21 km trail running
  • Sun 22 Sep
  • £95-£120
Aberdyfi, Gwynedd, UK

Dyfi Aquathlon 26K

The Longest Aquathlon in the World

  • 13 km sea swimming
  • 13 km trail running

Long aquathlons near you

Select your location for long distance aquathlons in your area.