The One on The River takes place across the scenic Thames Valley area.
Swim the river, cycle the hilly open roads, or run the flat Thames path – with a mixture of grass, tarmac, and trail – taking in the views of Marlow and the surrounding areas. Join the Triathlon for the ultimate challenge, or either of our Duathlon/Aquabike categories if you prefer to focus on specific disciplines. If you only fancy a dip in the Thames, then pick one of our swim-only categories instead and get yourself wet! With multiple distances for each discipline, you’ll find something to challenge yourself this year.
08:30
£65
Age 18 & over
07:30
£75-£90
Age 18 & over
06:30
£110-£125
Age 18 & over
08:30
£50
Age 18 & over
07:30
£55-£70
Age 18 & over
06:30
£80-£95
Age 18 & over
08:30
£25
Age 18 & over
07:30
£30
Age 18 & over
06:30
£40
Age 18 & over