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The Thames Marathon is an endurance swim between Henley-on-Thames and Marlow with a choice of 3 distances.This swim covers one of the most stunning stretches of the River Thames and has become one of open water swimming’s most prestigious marathon swims.
The Thames Marathon swim is approximately 13km and is split into 4 sections. Swimmers will be required to exit the water at the 3 locks (Hambleden, Hurley and Temple).
There is also a 9km option and a 5.5km option.
Drinks and energy snacks will be available for all swimmers at the locks, home to our famous feed stations!
This award winning event has consistently received Gold Racecheck Awards when rated by participants.
It is the perfect event for a personal or charity challenge.
Click Interested or Going to make sure you are the first to hear news and updates about this event.
Come swim the Marathon with us in 2026!
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Event Venue
Higginson Park Marlow, Marlow Park, Marlow, SL7 2, United Kingdom
Tickets
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