Dorney Triathlon

Dorney Lake Events

From Dorney Lake Events

4.5 · 14 reviews
Saturday 9th August 2025 Past event
07:30
Windsor
£60.00–£101.00 · 5 races
Sprint, Olympic

Rated 4.5/5 from 14 reviews

36 took part

Event summary

Get ready for an unforgettable day at the Dorney Triathlon, hosted by Dorney Lake Events on Saturday, 9th August 2025! Set in the beautiful surroundings of Windsor, Berkshire, this exciting event invites athletes of all levels to take part in an exhilarating triathlon experience at the iconic Dorney Lake, a renowned Olympic venue. Participants can choose from three thrilling race distances: the Super Sprint featuring a 400m swim, 10km bike ride, and 2.5km run; the Sprint with a 750m swim, 20km bike, and 5km run; or the Standard distance consisting of a 1500m swim, 40km bike, and 10km run.

For those who prefer to focus on just the swim and bike, there’s an Aquabike option, and teams can join in on the fun with a relay format, allowing 2 or 3 individuals to tackle the disciplines together. The flat, fast course promises an excellent opportunity for personal bests, with distance flags marking each segment and plenty of enthusiastic volunteers cheering you on. Don’t miss out on this inspiring and vibrant event—mark your calendars for the Dorney Triathlon and prepare to race your way to

Reviews

4.5

14 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

Took part in the 2026 edition · 2 months ago

Well organised, great location, good value event.
RP
Robert Peake Verified entrant

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

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!
AC
Antony Cooper Verified entrant

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

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
MH
max humphries Verified entrant

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

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

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

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

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

Took part in the 2022 edition · 4 years ago

Great day all round !
EH
Edward Hicks Verified entrant

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

  • Sprint Triathlon

    £80.00

    Entries closed

  • Super Sprint Triathlon

    £60.00

    Entries closed

  • Sprint Aquabike

    £70.00

    Entries closed

  • Standard Aquabike

    £91.00

    Entries closed

  • Standard Triathlon

    £101.00

    Entries closed

Event information

Organiser's description

JOIN US FOR THE DORNEY TRIATHLON ON SUNDAY 9TH AUGUST 2025

Take on a Super Sprint Sprint or Standard triathlon around Dorney Lake on Sunday 9th August 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 Lake Events

Dorney Lake Events

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Since 2017
Events 150+
Avg. review 4.5
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