River swimming events

River swimming events

Experience beautiful locations from a new perspective in complete safety.

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River swims in the UK

Organised river swims allow you to experience beautiful locations from a new perspective in complete safety. River swims can range from less than a kilometre to several miles - some events even use the tide to make it easier! Grab your wetsuit and discover a new way to adventure!

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River swims in 2025/2026

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

Take on a challenge like no other as you swim a marathon or half marathon distance over 12 weeks and lift your health, wellbeing and fitness to the next level.
  • Sat 6 Sep - Fri 24 Oct
  • FREE
Anywhere

Swim Marathon

Take on a challenge like no other as you swim a marathon or half marathon distance over 12 weeks and lift your health, wellbeing and fitness to the next level.

  • Charity swim 2
  • Sun 21 Sep
  • £25-£110
Henley-on-Thames, Buckinghamshire, UK

The One on the River | Henley

Taking place across the scenic Thames Valley area with routes going through Culden Faw Estate. Swim the river, cycle the hilly open roads, run through the trail paths enjoying great views.

  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • Sprint aquabike
  • Standard aquabike
  • + 4 more races
  • Recycling
  • Newcomers
  • Event village
  • Park
  • Sustainability policy
  • Age 17 & over
  • Events