Long aquathlons

Long aquathlons

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

1

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.

Filter by place

Filter by date

Map view

Long aquathlons in 2025/2026

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

The Sundowner 70.3 Aquathlon is back! Race as the sun sets in an unforgettable triathlon event at Allerthorpe Lakeland Park in Yorkshire which is now back on the race calendar.
  • Sat 12 Sep
  • £100
York, East Yorkshire, UK

Sundowner 70.3 Aquathlon

The Sundowner 70.3 Aquathlon is back! Race as the sun sets in an unforgettable triathlon event at Allerthorpe Lakeland Park in Yorkshire which is now back on the race calendar.

  • 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.

4 steps to wellbeing
Sleep well

A good night's sleep is an essential foundation for a healthy lifestyle, effective training and weight control.

Train slow

Low-intensity training is easier for you, reduces the risk of injury and helps builds an efficient aerobic system.

Eat natural

Cut out sugar & junk food, reduce carbs, eat natural foods and train your body to burn fat for fuel.

Get outdoors

Fresh air, natural light and reconnecting with nature all help to improve mental and physical wellbeing.