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 2025/2026

Featured events are listed below - select a month/region or the map view to see all events.

Bringing back the Sundowner 70.3 Aquathlon! An unforgettable triathlon event at Allerthorpe Lakeland Park in Yorkshire is now back on the race calendar and 100% going ahead!
  • Sat 13 Sep
  • £100
York, East Yorkshire, UK

Sundowner 70.3 Aquathlon

Bringing back the Sundowner 70.3 Aquathlon! An unforgettable triathlon event at Allerthorpe Lakeland Park in Yorkshire is now back on the race calendar and 100% going ahead!

  • 1900 m lake swimming
  • 20 km trail running + 17 ft ascent

Long aquathlons near you

Select your location for long distance aquathlons in your area.