Sun 10 Aug 2025 Marlow, Buckinghamshire, UK

Thames Marathon | Marathon Swim

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

  • Sun 10 Aug 2025
Higginson Park, Marlow, Marlow

Marathon Swim

07:00

Age 18 & over

£130

  • 13 km river swimming

Event details

  • All fitness levels
  • Dogs allowed
  • Event village
  • Free venue entry
  • Newcomers
  • Spectators
  • Traders at event

Location

  • Bag storage
  • Bar
  • BBQ
  • Changing facilities
  • Paid parking
  • Toilets

Route

  • Cut off time
  • Food stations
  • Wave start

Sustainability

  • Recycling

Entries

  • Age 18 & over
  • Entries open
  • Charity entries open
  • Enter online