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River swims in South East in August 2025

Find river swims near me in South East in August 2025 - search by date or place, display on a map or use the advanced search to find your perfect race.

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A long-distance swimming marathon with multiple distances and feed stations from Henley-on-Thames to Marlow.
  • Sun 10 Aug 2025
  • Sun 10 Aug 2025
Marlow, Buckinghamshire, UK

Thames Marathon | Half Marathon Swim charity places

A long-distance swimming marathon with multiple distances and feed stations from Henley-on-Thames to Marlow.

  • Enter online
  • Age 18 & over
  • 5.5 km river swimming
A long-distance swimming marathon with multiple distances and feed stations from Henley-on-Thames to Marlow.
  • Sun 10 Aug 2025
  • 1 charity
  • Sun 10 Aug 2025
  • 1 charity
Marlow, Buckinghamshire, UK

Thames Marathon | Marathon Swim charity places

A long-distance swimming marathon with multiple distances and feed stations from Henley-on-Thames to Marlow.

  • Enter online
  • Age 18 & over
  • 13 km river swimming
  • Sun 10 Aug 2025
Marlow, Buckinghamshire, UK

Thames Marathon | Mid-Distance Swim Marathon

  • 9 km river swimming
  • Sun 10 Aug 2025
Marlow, Buckinghamshire, UK

Thames Marathon | 3-Person Swim Relay

  • 13 km river swimming

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