The One on the River - Henley

SEP
20
2026
A multisport event on the River Thames at Henley Showground featuring triathlon, aquabike and open water swim options. Entries include a finisher medal and chip timing and a tree is planted for every entry.
Sun 20 Sep 2026
750m Swim 1500m Swim 3000m Swim Sprint Distance Run Standard Distance Run

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The One on the River - Henley

The One on the River - Henley is a multisport event held in the Thames Valley at Henley Showground and routes that pass through the Culden Faw Estate. The event includes open water swims in the River Thames together with road bike and trail run legs. The event date is 20 September 2026 and the event village is located at Henley Showground, Hambleden, Henley-on-Thames RG9 3AS.

Distances offered include:

  • Triathlon: Middle, Standard, Sprint
  • Aquabike: Middle, Standard, Sprint
  • Swim: 3000 m, 1500 m, 750 m

Entries include a finisher medal, refreshments and chip timing. Race pack items are issued on the event day at Registration and include a timing chip, bib number, bike and helmet stickers and a swim hat. Interactive route maps and marshalled courses are provided and participants complete laps according to the distance they enter. A tree is planted for every entry.

Facilities and procedures noted for participants: medical cover on site, a food caterer at the village, free portable toilets and no dedicated changing rooms or showers. Water stations are provided at the start and finish, on the run route, and a self service refill station is available on the bike course. British Triathlon membership or a Race Pass is required for participation. Headphones are prohibited. Spectators are permitted in start and finish areas. Entries from participants with medical assistance dogs may be accepted with prior approval. Race deferrals are allowed until registration closes subject to an administration fee. Visit the organization's website for the most recent information.

20 km
Middle Distance Run
10 km
Standard Distance Run
5 km
Sprint Distance Run
3000m Swim
1500m Swim
750m Swim
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