The One on the Lake - Dorney

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From onerace events

  • Date Sun 7th September 2025
  • Time 08:00
  • Location Windsor, Berkshire
  • Price £25.00 - £75.00
  • Races 15 races
  • Distances Super Sprint, Sprint, Olympic, Middle Distance / 70.3

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Two athletes wearing medals and race bibs are smiling and standing together at a finish line. The man on the right holds a trophy. They are outdoors on a sunny day with banners and green trees in the background.

The One on the Lake - Dorney

Sun 7th September 2025

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Event summary

Get ready for an unforgettable day at The One on the Lake - Dorney, hosted by the renowned OneRace Events! On Sunday, September 7th, 2025, participants will gather at the stunning Dorney Lake in Windsor, Berkshire, for a variety of exciting race distances. This event is perfect for water enthusiasts, featuring triathlon, aquabike, duathlon, aquathlon, and swim categories, all set against the backdrop of a spectacular flat and smooth-surfaced lake.

Whether you’re a seasoned athlete or a newcomer to the racing scene, The One on the Lake promises a fun and inspiring atmosphere. Join fellow competitors in this vibrant celebration of sport and nature, and make lasting memories while challenging yourself in a beautiful setting! Don’t miss out on this fantastic opportunity to be part of an incredible event!

The One on the Lake - Dorney

Sun 7th September 2025

Two athletes wearing medals and race bibs are smiling and standing together at a finish line. The man on the right holds a trophy. They are outdoors on a sunny day with banners and green trees in the background. A group of swimmers wearing orange caps participate in an open water swim near a large orange buoy. Kayakers in the background oversee the event. The setting is a river with lush greenery and houses on the banks. Two smiling women in wetsuits and swim caps stand outdoors, holding medals around their necks. They appear to be celebrating after a swimming event. One holds a banana and a drink. Trees and a building are visible in the background.

Organiser's Description

Set at the spectacular, flat, and smooth-surfaced Dorney Lake near Windsor, this event for the ones that enjoy being by the water. Join for the distances in triathlon, aquabike, duathlon, aquathlon and swim!

Races

  • Triathlon - Standard

    Sun 7th September 2025 (00:00)

    £75.00

    CLOSED

  • Triathlon - Sprint

    Sun 7th September 2025 (00:00)

    £65.00

    CLOSED

  • Triathlon - Super Sprint

    Sun 7th September 2025 (00:00)

    £55.00

    CLOSED

  • Duathlon - Standard

    Sun 7th September 2025 (00:00)

    £60.00

    CLOSED

  • Duathlon - Sprint

    Sun 7th September 2025 (00:00)

    £55.00

    CLOSED

  • Duathlon - Super Sprint

    Sun 7th September 2025 (00:00)

    £50.00

    CLOSED

  • Aquabike - Standard

    Sun 7th September 2025 (00:00)

    £55.00

    CLOSED

  • Aquabike - Sprint

    Sun 7th September 2025 (00:00)

    £50.00

    CLOSED

  • Aquabike - Super Sprint

    Sun 7th September 2025 (00:00)

    £45.00

    CLOSED

  • Aquathlon - Standard

    Sun 7th September 2025 (00:00)

    £55.00

    CLOSED

  • Aquathlon - Sprint

    Sun 7th September 2025 (00:00)

    £50.00

    CLOSED

  • Aquathlon - Super Sprint

    Sun 7th September 2025 (00:00)

    £45.00

    CLOSED

  • Swim - 3000m

    Sun 7th September 2025 (00:00)

    £40.00

    CLOSED

  • Swim - 1500m

    Sun 7th September 2025 (00:00)

    £30.00

    CLOSED

  • Swim - 750m

    Sun 7th September 2025 (00:00)

    £25.00

    CLOSED

Book

  • Triathlon - Standard

    Sun 7th September 2025 (00:00)

    £75.00

    CLOSED

  • Triathlon - Sprint

    Sun 7th September 2025 (00:00)

    £65.00

    CLOSED

  • Triathlon - Super Sprint

    Sun 7th September 2025 (00:00)

    £55.00

    CLOSED

  • Duathlon - Standard

    Sun 7th September 2025 (00:00)

    £60.00

    CLOSED

  • Duathlon - Sprint

    Sun 7th September 2025 (00:00)

    £55.00

    CLOSED

  • Duathlon - Super Sprint

    Sun 7th September 2025 (00:00)

    £50.00

    CLOSED

  • Aquabike - Standard

    Sun 7th September 2025 (00:00)

    £55.00

    CLOSED

  • Aquabike - Sprint

    Sun 7th September 2025 (00:00)

    £50.00

    CLOSED

  • Aquabike - Super Sprint

    Sun 7th September 2025 (00:00)

    £45.00

    CLOSED

  • Aquathlon - Standard

    Sun 7th September 2025 (00:00)

    £55.00

    CLOSED

  • Aquathlon - Sprint

    Sun 7th September 2025 (00:00)

    £50.00

    CLOSED

  • Aquathlon - Super Sprint

    Sun 7th September 2025 (00:00)

    £45.00

    CLOSED

  • Swim - 3000m

    Sun 7th September 2025 (00:00)

    £40.00

    CLOSED

  • Swim - 1500m

    Sun 7th September 2025 (00:00)

    £30.00

    CLOSED

  • Swim - 750m

    Sun 7th September 2025 (00:00)

    £25.00

    CLOSED

Course Details

All swim, bike and run courses are marked with signs and well marshalled.

Based on the distance you are completing you will be required to do a particular number of laps at each leg.

The One on the Lake - Dorney course map
The One on the Lake - Dorney course map

What's Included

- Chip Timing
- Finisher Medal
- Refreshments & Snacks
- Photos

How to Get There

What3Words: ///cheer.spins.rails

Location

Village Location
Event village in situated in Dorney Lake Boathouse, Court Ln, Dorney, Windsor, SL4 6Q
On arrival to the site please follow the event signage.

on the day

Race Pack Collection
Your timing chip, bib number and bike/helmet stickers will be available for collection on the event day from 06:45am. These will be ready for you to collect from Registration Tent, which will be located between the river and transition.

Depending on the event discipline you are competing in, you will be supplied with the following:
· timing chip (to be worn on your left ankle);
· bib number;
· bike and helmet stickers;
· swim hat.
​
Participants should not expect to receive anything by mail.

Registration on the day might be available.
​
Transition area
Transition area opens at 06:45am. To enter transition, you must show your corresponding event number and bike sticker (which must be stuck to your seat post) to the event marshal.
​
The Route
All swim, bike and run courses are marked with signs and well marshalled.
The course map is available to view here.
Based on the distance you are completing you will be required to do a particular number of laps at each leg.
​
Pre-Race Email
Detailed pre-race information will be published to all registered participants 2 weeks prior to the event.

facilities

Medical Cover
Suitable medical cover is provided at our events in case of a medical emergency.
​
Bag Drop
Whilst we recommend bringing as little as possible, runners can leave essential belongings with us using the tear-off baggage strip on their bib.
Bag drop will not be available for the multisport events. Participants should leave all belongings with their vehicle/in transition where possible and arrive ready to run
​
Catering
We will have a food caterer onsite for pre and post race refreshments.
​
Photography
Event images are expected to be available, usually within 24 hours of the event.
Toilets
There are free portable toilets in the event village. This is your only chance to go, as there won't be toilets on the route.
​
Changing Room / Showers
There are no dedicated changing rooms/showers.
​
Water / Snack Stations
Water will be available at the start and finish for a refill.
Run routes only will have the water stations on course. Participants must carry with them anything necessary to refuel and hydrate during the remainder of the event.

further information

Spectators
Spectators are permitted anywhere in the start finish area. Please be mindful of others' comfort and safety in more popular locations, including the finish area.
​
Dogs
Participants must not be accompanied by a personally owned or controlled dog during an event. Entries may be accepted from participants with medical assistance dogs, subject to them being correctly registered and identifiable as such, and subject to prior approval by the Event Director.
​
Buggies, Pushchairs and Strollers
This event is not suitable for buggies, pushchairs, strollers (or similar) due to the nature of the terrain.
Wheelchairs
These events are suitable for wheelchair users. Any participants wishing to compete with specialised equipment are asked to contact us before entering to ensure we can accommodate any additional requirements.
​
Earphones / Headphones
Noise-cancelling earphones/headphones are prohibited and, whilst we discourage the use of other earphones/headphones at our events, participants choosing to use them should ensure they are set to a low enough volume that instructions from event officials can be clearly understood.
​
Race Deferrals
Race deferrals are allowed until the event registration is closed (usually the Friday 12noon before the event date).

Reviews

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Location

SL4 6QP, Windsor, United Kingdom

Who's In

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Doing

CS

Claire Skinner

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LC

Liz Chatfield

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MW

Mia Williams

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The One on the Lake - Dorney

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