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 27 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
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.