Dorney Triathlon
DL
From Dorney Lake Events
4.5 ·
14 reviews
Saturday 27th September 2025
Past event
07:30
Windsor
£60.00–£122.00 · 7 races
Sprint, Olympic
Event summary
Get ready for an exhilarating day at the Dorney Triathlon, hosted by Dorney Lake Events on Saturday, September 27, 2025! Set against the stunning backdrop of Windsor, Berkshire, this triathlon offers participants the chance to race in one of the most iconic Olympic venues. Athletes can choose from three exciting race distances: the Super Sprint featuring a 400m swim, 10km bike, and 2.5km run; the Sprint with a 750m swim, 20km bike, and 5km run; or the Standard distance that includes a 1500m swim, 40km bike, and 10km run.
For those looking for a different challenge, the event also includes an Aquabike option, allowing participants to compete in the swim and bike segments only. Additionally, you can form a team and tackle the relay option, splitting the disciplines among 2 or 3 teammates. With a perfectly laid out course, distance flags, and enthusiastic volunteers to cheer you on, the Dorney Triathlon is the perfect opportunity to achieve a personal best. Don't miss out on this fantastic event—mark your calendar and prepare for an unforgettable race day!
For those looking for a different challenge, the event also includes an Aquabike option, allowing participants to compete in the swim and bike segments only. Additionally, you can form a team and tackle the relay option, splitting the disciplines among 2 or 3 teammates. With a perfectly laid out course, distance flags, and enthusiastic volunteers to cheer you on, the Dorney Triathlon is the perfect opportunity to achieve a personal best. Don't miss out on this fantastic event—mark your calendar and prepare for an unforgettable race day!
Dorney Triathlon
This event has taken place
Congratulations to everyone who took part. We're waiting on information about the next edition of this event.
Did you race? Let the community know how you got on and leave a review.
Previous editions
- 26th Sep 2026
- 30th Aug 2026
- 8th Aug 2026
- 26th Jul 2026
- 12th Jul 2026
- 6th Jun 2026
- 2nd May 2026
- 9th Aug 2025
- 27th Jul 2025
- 13th Jul 2025
- 7th Jun 2025
- 1st Sep 2024
- 11th Aug 2024
- 14th Jul 2024
- 8th Jun 2024
- 4th May 2024
- 27th Aug 2023
- 6th Aug 2023
- 16th Jul 2023
- 10th Jun 2023
- 21st May 2023
- 28th Aug 2022
- 3rd Aug 2022
- 31st Jul 2022
- 17th Jul 2022
- 12th Jun 2022
- 21st May 2022
- 29th Aug 2021
- 18th Jul 2021
- 13th Jun 2021
- 23rd May 2021
- 12th Sep 2020
- 30th Aug 2020
- 19th Jul 2020
- 11th Aug 2019
- 8th Jun 2019
- 9th Jun 2018
- 13th Aug 2017
Add your review
Reviews
4.514 reviews
RM
Rog McDonnell
Reviewing the 2026 edition · 2 months ago
Really badly organised. Queues for registration were very long and disorganised even when we arrived early. No priority for the sprint tri starting first. We ended up missing the race briefing and not having time to set up our stuff. Even though the venue is brilliant, it just felt under staffed and badly organised, which ruined or first triathlon experience.
WW
Will Willetts
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2026 edition · 2 months ago
Well organised, great location, good value event.
RP
Robert Peake
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2026 edition · 5 months ago
Superlative organsiaation at a perfect tri venue, with clear and friendly support throughout the day from the race team and fellow competitors. I booked for another the next morning.
RW
Rob Waterhouse
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2025 edition · 1 year ago
Really well organised event, despite the very early start! Impressive how so many different events are co-ordinated on the same day.
As a first timer, it was a bit daunting and the only thing that would have made it slightly easier, if there were pre-made holes in the number for your strings on the number belt!
As a first timer, it was a bit daunting and the only thing that would have made it slightly easier, if there were pre-made holes in the number for your strings on the number belt!
AC
Antony Cooper
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2024 edition · 2 years ago
Really well organised and huge amount of support to help complete the event. It's perfectly set and self contained. Looking forward to next year's event.
SC
Stephen Clark
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2024 edition · 2 years ago
The race itself was a 5/5 event. The disappointment was the lack of lack of catering and refreshments. One van that just did teas / coffees / soft drinks. The catering room in the pavilion had nothing for vegetarians, hardly anything left, this was at 12 noon.
Just one small merch pop up with not much stock.
Other events we've attended at Dorney Lake have had so much more.
Race was good and well organised though
Just one small merch pop up with not much stock.
Other events we've attended at Dorney Lake have had so much more.
Race was good and well organised though
MH
max humphries
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2023 edition · 3 years ago
A perfect event. There was a very clear pre race information pack and any questions were promtly answered. Everybody I interacted with both on the day and before the event was absolutely lovely and I look forward to coming back. A nice flat course really opens up the opportunity for people to come along and try the sport that are otherwise intimidated. 10/10 recommended
JS
James Sellman
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2023 edition · 3 years ago
Brilliant venue and very well organised on the day. My only faults were how long it took to get our raceday information pack and the lack of water stations or shade on the 10k run.
MN
Martin Nicholas
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2023 edition · 3 years ago
First Triathlon, extremely well organised and hugely enjoyable. Will do again
PC
Patrick Cheong-See
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2022 edition · 4 years ago
This was a great venue to do my first sprint triathlon. The event was very well organised and the layout of the swim, ride and run were simple to navigate. The course for riding and running are nice and flat so a great way to ease you into the sport.
AM
Ashwin Menon
Reviewing the 2020 edition · 4 years ago
Superbly organised event and the course is epic. Great swim loop and flat bike course. I loved it and will definitely do it again.
MD
Matthew Durnan
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2022 edition · 4 years ago
Well organised event. Kept well informed via email and SMS. Clear race briefing video. Very flat course for my first triathlon. Cheers
TM
TONY MCCARTHY
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2022 edition · 4 years ago
Great day all round !
EH
Edward Hicks
Verified entrant
This reviewer is a verified Find a Race user who purchased a place at this event.
Took part in the 2022 edition · 4 years ago
A great event at a fantastic venue! Lovely Marshalls and supporting crowds. The only thing I would say is there wasn't a race briefing at the beginning - I thought we had to swim 2 laps of 750m, but it turned out it was only 1 lap of 1500m. Only a minor thing, otherwise it was amazing!
Races
-
Super Sprint Triathlon
Entries closed£60.00
-
Sprint Triathlon
Entries closed£80.00
-
Sprint Relay
Team of 3Entries closed£101.00 per team
-
Sprint Aquabike
Entries closed£70.00
-
Standard Aquabike
Entries closed£91.00
-
Standard Triathlon
Entries closed£101.00
-
Standard Relay
Team of 3Entries closed£122.00 per team
Event information
Each discipline will be accurately marked out with distance flags and we will have plenty of helpers to keep you on track and to encourage you all the way to the finish.
Chip timed results
Unique themed medal (previous design pictured)
Free official event photos
Unique themed medal (previous design pictured)
Free official event photos
There will be free parking available for all participants next to the event village.
Dorney Lake, Off Court Lane, Windsor, Berks, SL4 6QR
For details on how to get to the park from nearby public transport please refer to Google Maps or City Mapper.
Nearest Train stations: Slough and Windsor & Eton Riverside
Nearest Train stations: Slough and Windsor & Eton Riverside
• 7:30am – Sprint Tri –Under50 ‘Open’ category
• 7:45am – Sprint Tri – 50 and Over ‘Open’ category & All Female category & All Sprint Relays & All Sprint Aquabike
• 8:30am – Standard Tri – Under40 ‘Open’ category
• 8:45am – Standard Tri – 40 and Over ‘Open’ category & All Female category & All Standard Relays & All Standard Aquabike
**Categories based on age at 31st December 2024**
For those who don’t want to take part in the run, there is also an Aquabike (swim-bike) option, and for those who would like to compete as a team, there is a relay option, which allows 2 or 3 individuals to share the disciplines between them.
• 7:45am – Sprint Tri – 50 and Over ‘Open’ category & All Female category & All Sprint Relays & All Sprint Aquabike
• 8:30am – Standard Tri – Under40 ‘Open’ category
• 8:45am – Standard Tri – 40 and Over ‘Open’ category & All Female category & All Standard Relays & All Standard Aquabike
**Categories based on age at 31st December 2024**
For those who don’t want to take part in the run, there is also an Aquabike (swim-bike) option, and for those who would like to compete as a team, there is a relay option, which allows 2 or 3 individuals to share the disciplines between them.
*Please arrive at least 45 minutes before the start of the race to allow enough time to register, set up your transition area and warm up.
Race Packs
Race Packs must be collected on the day of the event, before the start of your race, from registration. Please be aware that you will not receive anything in the post. Registration will take place by the main boathouse at the far end of the lake.
Bag Drop
There will not be a baggage drop area for you to leave any belongings however you will be allowed a small bag to be left alongside your bike within the transition area.
Toilets
There will be toilets a short distance from the transition area.
Spectators
Spectators are strongly encouraged to come along, as they are integral to creating a supportive and energetic atmosphere for the runners.
The course is also lapped meaning spectators will be able to see runners on multiple occasions.
Race Packs
Race Packs must be collected on the day of the event, before the start of your race, from registration. Please be aware that you will not receive anything in the post. Registration will take place by the main boathouse at the far end of the lake.
Bag Drop
There will not be a baggage drop area for you to leave any belongings however you will be allowed a small bag to be left alongside your bike within the transition area.
Toilets
There will be toilets a short distance from the transition area.
Spectators
Spectators are strongly encouraged to come along, as they are integral to creating a supportive and energetic atmosphere for the runners.
The course is also lapped meaning spectators will be able to see runners on multiple occasions.
Organiser's description
Join us for the Dorney Triathlon on Sat, 27th Sep 2025
Take on a Super Sprint Sprint or Standard triathlon around Dorney Lake on Sat, 27th Sep 2025 and take the opportunity to race around this unique and inspiring Olympic venue!
The purpose built lake is perfect for the swim and the flat grounds lend themselves to a totally flat bike and run course, the ideal venue for a chip timed personal best. Each discipline will be accurately marked out with distance flags and we will have plenty of helpers to keep you on track and to encourage you all the way to the finish.
For those who don’t want to take part in the run, there is also an Aquabike (swim-bike) option, and for those who would like to compete as a team, there is a relay option, which allows 2 or 3 individuals to share the disciplines between them.
Super Sprint: 400m Swim | 10km bike | 2.5km Run
Sprint: 750m Swim | 20km bike | 5km Run
Standard: 1500m Swim | 40km bike | 10km Run
Take on a Super Sprint Sprint or Standard triathlon around Dorney Lake on Sat, 27th Sep 2025 and take the opportunity to race around this unique and inspiring Olympic venue!
The purpose built lake is perfect for the swim and the flat grounds lend themselves to a totally flat bike and run course, the ideal venue for a chip timed personal best. Each discipline will be accurately marked out with distance flags and we will have plenty of helpers to keep you on track and to encourage you all the way to the finish.
For those who don’t want to take part in the run, there is also an Aquabike (swim-bike) option, and for those who would like to compete as a team, there is a relay option, which allows 2 or 3 individuals to share the disciplines between them.
Super Sprint: 400m Swim | 10km bike | 2.5km Run
Sprint: 750m Swim | 20km bike | 5km Run
Standard: 1500m Swim | 40km bike | 10km Run
Location
Dorney Lake, Marsh Lane, Windsor, SL4 6QR, United Kingdom
Dorney Triathlon
DL
Dorney Lake Events
On Find a Race
Since
2017
Events
150+
Avg. review
4.5
