One on the River - Marlow Triathlon - Sunday 31st 06:30 - Sunday 31st May 2026 16:00

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One on the River - Marlow Triathlon

Before you enter One on the River - Marlow Triathlon

Triathlon Middle Swim 1900m | Bike 91km | Run 20km
Triathlon Standard Swim 1500m | Bike 40km | Run 10km
Triathlon Sprint Swim 750m | Bike 24km | Run 5km

Duathlon Middle Bike 91km | Run 5km + 20km
Duathlon Standard Bike 40km | Run 5km + 10km
Duathlon Sprint Bike 24km | Run 5km + 5km

Aquabike Middle Swim 1900m | Bike 91km
Aquabike Standard Swim 1500m | Bike 40km
Aquabike Sprint Swim 750m | Bike 24km

Aquathlon Middle Swim 1900m | Run 20km
Aquathlon Standard  Swim1500m | Run 10km
Aquathlon Sprint Swim 750m | Run 5km

Swim 3000m
Swim 1500m
Swim 750m

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 Event Merchandise View store

  • Swiftal Running Vest Swiftal Running Vest

    £

    Swiftal Running Vest
    Swiftal Running Vest

    DELIVERY INFORMATION – Orders are shipped within 2–5 working days. All orders are fulfilled and dispatched by Swiftal.

    PHONE & WATER STORAGE – Six secure pockets for your phone, keys, cards, and water bottle. No need for a separate running belt – it keeps all your essentials in one place.

    ADJUSTABLE & COMFORTABLE – Take the Guess work out of finding the right fit - Are you a Small or a Medium who knows? Our Chest and waist straps fully adjust up and down, loosen and tighten to make sure you are comfortable every time!

    STAY HYDRATED – Fits a 1.5L water bladder (not included) and 2x 500ml soft water flasks.

    REFLECTIVE FOR SAFETY – Scared Cars won't see you? Our Reflective strips enhance visibility in low light, perfect for early morning or evening runs.


    £



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About One on the River - Marlow Triathlon

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.
We are hosing two British Triathlon Age-Group Major Events in 2026. English Standard Distance Aquabike and World Standard Distance Aquabike Qualifier

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Affiliations

This event has the following affiliations or accreditations:
Silver Partnership

Contact One on the River - Marlow Triathlon

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