Dorney Triathlon – 29th August 2021

Dorney Triathlon


Take on a Sprint or Standard distance and take the opportunity to race around this unique and inspiring Olympic venue!! This event is non-draft legal.

The flat and scenic grounds lend themselves to a totally flat bike and run course, the ideal venue for a chip timed personal best. We will have plenty of helpers to keep you on track and to encourage you all the way to the finish.

The Sprint triathlon will begin at 07:00am and will take the style of a time trial with athletes started at 20 second intervals with the fastest athletes starting the swim first. This is based on the estimated finish time given during registration.

The Standard triathlon will start at 08:00am in the same format.

Many people are understandably nervous regarding entering events again and we want to assure you that we take every measure we can to organise a safe, socially distanced event. To see this in action watch our video Covid-19 Safety at ActiveTrainingWorld Running and Triathlon Events.

  • Location: Dorney Lake, Court Lane, off Lake End Road, Windsor SL4 6FJ
  • Start times: 07:00am – Sprint Triathlon, 08.00am – Standard Triathlon
  • Distances: Standard = 1500m Swim, 40k bike, 10k run | Sprint = 750m swim, 20k bike, 5k run | Aquabike Standard & Sprint = as above minus the run

  • Minimum Age: Standard Triathlon/Aquabike: 17yrs (on 31/12/2021) Sprint Triathlon/Aquabike: 15yrs (on 29/08/2021) Parental Consent required
  • Activity: Swimming, Cycling & Running

  • Open to: Solo participants and  relay teams

  • Entry Fee: 4 options from just £50 per person (Details below)

  • Event Cancellation Policy: We want you to book with confidence so, if this event can no longer go ahead, and an alternative date isn’t found, you will be offered a virtual run or a refund of your entry fee (Booking fees are non-refundable)
  • Additional Fees: None
  • Event Organiser: Active Training World
  • Organiser Email:
  • Official Event Website:

Race numbers will be collected at the the event venue on the morning of the race.

Sprint Triathlon/ Aquabike – Registration opens at: 06:00am

Standard Triathlon/ Aquabike – Registration opens at: 07:00am

The day license for Non-BTF members is included in the entry price.

There will be an online race briefing made available before the event, it is mandatory to have watched this as there will be no pre-race briefing on the day.

Please arrive in sufficient time to collect your race number.


The run course uses a traffic-free, flat 5km lap. The bike course uses a traffic free, flat 4.8km lap.

Dorney Lake Swim Course

The route is clockwise. The course will be well marked with swim buoys after completing your lap, you will head for the swim exit marked by flags.

Dorney Lake Bike Course

The 5km bike loop will be completed 4 times for sprint distance athletes and 8 times for standard distance athletes. It is your responsibility to count your own laps. We find the best way of doing this is with the aid of a bike computer or watch.

Dorney Lake Run Course

Starting from the transition area, triathletes will run either 1 or two out and back loops, alongside the lake. The run course uses a traffic-free, flat 5km lap.

Laps on flat tarmac paths.

We actively welcome support and involvement from local communities, businesses and individuals. If you would like to find out more about marshalling, sponsorship or group bookings please contact us at the address below.

Spectators are currently not allowed. If this situation should change we will update this page.

If you would like more info on this event please use the email address below:


Custom designed medal for all finishers!

There will be no prizegiving on the day but your well-earned medals will be issued at the finish.

There will be full results on the chip timing website both overall and by category.


Need help with your running? Whether this is your first triathlon and you want to know how to prepare, or you are looking to smash your personal best – following a training plan will increase your chances of achieving your goals.

Visit the ATW Shop to submit your requirements for a fully customised run training plan.

It is important that you are fit to run and have not experienced any Covid-19 symptoms in the 14 days leading up to the event.

Race Numbers
Please wear your number pinned to the front and back of your vest or alternatively, using a race belt, rotate the race number to the back for the bike leg and the front for the run leg.

Free parking available.

Changing Facilities
We will not be providing a changing area, therefore please come changed and ready to race.

Baggage Drop
There will be an informal baggage drop area for you to leave any belongings within the transition area.

There will be toilets available.

Water Station
There will be no water stations on the route (you will need to carry any liquids you need). There will be water available, self-service style, at the finish.

If you are unable to attend due to illness, injury, family bereavement, jury service you will only be eligible for a refund on production of official evidence: Positive Covid-19 test result, Doctor’s note, Death Certificate etc.

Event Cancellation
If the event should have to be cancelled due to reasons beyond ATW’s control (for example, severe weather, local or national lockdown) entrants will be given a range of options to choose from, which will include a refund of their entry fee (less the booking fee).

By entering this event you agree to the below terms and conditions:

Your details will kept in accordance with the Active Training World Privacy Policy

Your name, date of birth and email details will be onto the chip timing company. Personal details will be deleted 1 week after the event.

Where specified on the booking form any medical information will be passed onto the medical team present at the event. 


1) I am over the age of 17 (Standard Triathlon/Aquabike) /15 (Sprint Triathlon/Aquabike) as at 29/08/2021 – Parental Consent also required.

2)  I declare that I am medically fit to compete & understand that I do so entirely at my own risk.

3) I understand that I enter the race at my own risk and that no person(s) or organisation(s) will be held responsible for any accident, injury or loss to myself, prior to, during or after the event.

4) I understand the organisers reserve the right to alter the arrangements and conditions, should circumstances require.

5)  By entering this event, I accept BTF rule.


The event is being officially timed by Event Chip Timing and the results will be available on the day at

Ticket Details

  • If this is your first registration on our new booking platform but had an ATW account previously, your old ATW log in details are now invalid and a new account will be created for you when you book your first event without logging in.
  • If you are booking more than 1 place, please ensure that you complete the individual details for each attendee accurately answering all the questions on their behalf.
  • Relay entries should be completed with lead entrant’s details only. Additional team members’ details will be taken at Registration on the day
  • The BTF Day License for the event is included in the price of a Non BTF Entry.
Details Price Qty
Dorney Triathlon Standard Entry Non BTF Member£76.00 (GBP)  
Dorney Triathlon Standard Entry BTF Member£70.00 (GBP)  
Dorney Triathlon Standard Relay Entry Non BTF Member£76.00 (GBP)  
Dorney Triathlon Standard Relay Entry BTF Member£70.00 (GBP)  
Dorney Triathlon Standard Aquabike Entry BTF Member£60.00 (GBP)  
Dorney Triathlon Standard Aquabike Entry Non BTF Member£66.00 (GBP)  
Dorney Triathlon Sprint Entry Non BTF Member£66.00 (GBP)  
Dorney Triathlon Sprint Entry BTF Member£60.00 (GBP)  
Dorney Triathlon Sprint Relay Entry Non BTF Member£66.00 (GBP)  
Dorney Triathlon Sprint Relay Entry BTF Member£60.00 (GBP)  
Dorney Triathlon Sprint Aquabike Entry Non BTF Member£56.00 (GBP)  
Dorney Triathlon Sprint Aquabike Entry BTF Member£50.00 (GBP)  

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