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
Featured events are listed below - select a month/region or the map view to see all events.
- Sun 27 Jul
- £100-£135
Aberdovey, Gwynedd, UK
Dyfi Aquathlon 26K
The Longest Aquathlon in the World. Forging new boundaries in aquathlon, it's the infamous Dyfi 13km swim, followed by a stunning 13km trail run back to Aberdyfi along the beautiful Wales Coast Path.
- 13 km sea swimming
- 13 km trail running
Long aquathlons near you
Select your location for long distance aquathlons in your area.