Sun 10 Aug 2025 Marlow, Buckinghamshire, UK

Thames Marathon | 3-Person Swim Relay

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

3-Person Swim Relay

07:00

Age 18 & over

£200

  • 13 km river swimming

Overview

The Thames Marathon is an endurance swim between Henley-on-Thames and Marlow with a choice of 3 distances and a relay option. The swims cover a beautiful stretch of the Thames and has become one of open water swimming’s most prestigious marathon swims. The Event Village, registration and the finish are in Higginson park in Marlow. Swimmers are transported to the start in coaches from here to start their event, swimming back to Marlow. There is also the option to walk or run to the start of the half-marathon.

This event is part of Thames Marathon.

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
  • Enter online

Other races at event

  • Sun 10 Aug 2025
  • #1 of 4
Higginson Park, Marlow, Marlow

Half Marathon Swim

07:00

Age 18 & over

£95

  • 5.5 km river swimming
  • Sun 10 Aug 2025
  • #2 of 4
Higginson Park, Marlow, Marlow

Marathon Swim

07:00

Age 18 & over

£130

  • 13 km river swimming
  • Sun 10 Aug 2025
  • #3 of 4
Higginson Park, Marlow, Marlow

Mid-Distance Swim Marathon

07:00

Age 18 & over

£119

  • 9 km river swimming
;