Dorney Lake Triathlon

4.5 · 21 reviews
votwo events logo

From votwo events

  • Date Sun 21st September 2025
  • Time 08:00
  • Location Windsor, Berkshire
  • Price £62.00 - £97.00
  • Races 6 races
  • Distances Super Sprint, Sprint, Olympic

Share this event

A large group of swimmers wearing black wetsuits and orange swim caps start a race in open water. The foreground shows churning water, and the background features lush green trees under a partly cloudy sky. A "Start" banner is visible on the right side.

Dorney Lake Triathlon

Sun 21st September 2025

4.5 · 21 reviews
Email
Messages
Whatsapp

Event summary

Get ready for an exhilarating day of athleticism at the Dorney Lake Triathlon, hosted by Votwo Events on Sunday, September 21, 2025. Set in the picturesque surroundings of Windsor, Berkshire, this event takes place at the iconic Eton Dorney Olympic venue, known for its stunning clear lake and pan-flat, traffic-free roads.

Whether you're a seasoned triathlete or a first-time racer, the Dorney Lake Triathlon offers the perfect environment to challenge yourself and achieve your personal best. With a smooth tarmac course designed for speed, participants can expect a thrilling race experience. Join us for a day filled with camaraderie, competition, and the breathtaking beauty of one of the UK's premier triathlon venues!

Dorney Lake Triathlon

Sun 21st September 2025

A large group of swimmers wearing black wetsuits and orange swim caps start a race in open water. The foreground shows churning water, and the background features lush green trees under a partly cloudy sky. A "Start" banner is visible on the right side. Close-up of a bicycle with a bright orange swim cap hanging from the handlebars. Blurred in the background, athletes prepare for a triathlon, some wearing wetsuits and swim caps. A green, outdoor environment suggests they are at the starting point. A group of swimmers competes in a triathlon, swimming towards the shore in a lake. Kayakers and rescue personnel observe from the water. A large tent branded with "VO:" and spectators are visible in the background amidst greenery. An overhead view of a triathlon transition area beside a body of water. Numerous bicycles are parked in rows, and participants are preparing for the next stage of the race, with some walking and others adjusting their gear. The sky is overcast.

Organiser's Description

The Olympic venue, Eton Dorney, offers pan flat, traffic-free roads, and a beautiful clear lake. The venue is private and specifically hired for the purpose of a traffic-free triathlon event.

Sunday 21st September 2025

Flat and very, very fast! Dorney Lake is renowned for its traffic-free, smooth tarmac course. The perfect setting for first-time racers and more experienced athletes alike

Races

  • Individual - Super Sprint

    450m/10km/2.5km

    £62.00

    CLOSED

  • Individual - Sprint

    750m/20km/5km

    £72.00

    CLOSED

  • Individual - Standard

    Individual - 1.5km/40km/10km

    £82.00

    CLOSED

  • Team Entry - Super Sprint

    £77.00 per

    CLOSED
    Team 3

  • Team Entry - Sprint

    £87.00 per

    CLOSED
    Team 3

  • Team Entry - Standard

    1.5km/40km/10km

    £97.00 per

    CLOSED
    Team 3

Book

  • Individual - Super Sprint

    450m/10km/2.5km

    £62.00

    CLOSED

  • Individual - Sprint

    750m/20km/5km

    £72.00

    CLOSED

  • Individual - Standard

    Individual - 1.5km/40km/10km

    £82.00

    CLOSED

  • Team Entry - Super Sprint

    £77.00 per

    CLOSED
    Team 3

  • Team Entry - Sprint

    £87.00 per

    CLOSED
    Team 3

  • Team Entry - Standard

    1.5km/40km/10km

    £97.00 per

    CLOSED
    Team 3

Course Details

Flat and very, very fast! Dorney Lake is renowned for its traffic-free, smooth tarmac course. The perfect setting for first-time racers and more experienced athletes alike.

Swim Course:
Super Sprint = x 1/2 lap. Sprint = 1 lap. Standard = 2 laps
750m clockwise. Rectangle course with the swim exit into transition. The water is very clean and clear. The lake tends to warm up very quickly after a few days of sunshine. The course marked by large inflatable buoys. Keep these to your right.

Bike Course:
Super Sprint = X 2 laps. Sprint = X 4 laps. Standard = X 8 laps.
Anti-clockwise lapped course around the return lake. Each lap is 5km long. Ride on the left-hand side and overtake on the right. No drafting or riding as a group. It is advisable to use a GPS or bike odometer to aid in counting laps.

Run Course:
Super Sprint = X 1/2 lap. Sprint = X 1 lap. Standard = X 2 laps.
Clockwise, looped course using the lakeside path and returning on the estate road. Drinks stations at the far and close turn points.

Transition:
The transition area is in front of the shower/toilet block and event registration.

Dorney Lake Triathlon course map
Dorney Lake Triathlon course map

What's Included

Finishers medal

Great traffic-free location

On-site free car parking

Water safety cover

Chip timing

Online results

Water station in transition and on the run course

Toilets

Event medics

Water safety cover

Great spectator viewing points

  • OLYMIPIC Venue . Flat / Safe A must for a PB
  • Enviromental Welsh Slate Medal
  • Free entrant and spectator parking
  • Excellent spectator viewing points
  • Dogs on a lead allowed on site

How to Get There

Just off M4 junction 7
Dorney Reach

Parking

Free parking at event - follow the yellow signs

Location

Dorney Lake, Eton College Rowing Centre, off Court Lane, Dorney, Windsor, Berkshire, SL4 6FJ
Nearest station is Taplow around 2 miles away

FAQs

  • Is wearing a wet suit compulsory.

    No. Wet suits are preferred but not mandatory

  • Do I need a licence or insurance to enter

    No. The event is not an British Triathlon registered. You are advise to take out your own personal insurance

Race Day Information

A link will be populated here and emailed to all entrants pre-event, giving detailed event instructions. It is a condition of entry to this event that you participate according to the instructions in the event information.

Timings are subject to change

Race details - previous year (please use for reference)

race merchandise

Stay warm at the event with this bespoke, thick, and cozy hooded top.

These will also be available at the event but you can now preorder your event hoody with us!

Sizes: Small - Extra Large

Team Entry

All the distances are open to teams of 3. Each team member completes a discipline in succession. You must inform the staff at registration that you are a team entry as you will have specific instructions for handing the chip between team members.

Wave Schedule

08:00 - Wave 1. Standard (Males 16 - 39)

08:30 - Wave 2. Standard (Males 40+ and Teams)

09:15 - Wave 3. Standard (Females)

10:00 - Wave 4. Sprint (Males 16 - 39)

10:30 - Wave 5. Sprint (Males 40+ and Teams)

11:00 - Wave 6. Sprint (Females)

11:30 - Wave 7. Super Sprint (Mixed and all ages)

Race distances

Individual - Super sprint - 450m/10km/2.5km

Individual - Sprint - 750m/20km/5km

Individual - Standard - 1.5km/40km/10km

Team - Super sprint - 450m/10km/2.5km

Team - Sprint - 750m/20km/5km

Team - Standard - 1.5km/40km/10km

Event rules

As part of the entry system to the event all participants agree to the following:

Triathlon briefings will be held 10 minutes before the start in the swim in area. You must attend the briefing ready to start your triathlon

All cyclists will wear a correctly fitted BS-EN cycle helmet

Cycles must have working front and rear brakes and all equipment must be in good serviceable order

Drafting and riding in groups is not permitted

Cyclists must ride on the left-hand side of the track and overtake on the right

Runners must run on the left-hand side of the path and overtake on the right

All cyclists will adhere to the rules and regulations of the highway code. Details can be found here

Full event rules and instructions can be found in the participant information pack published on this page nearer the time of the event

spectators

Eton Dorney is the perfect venue for spectators with a large viewing balcony and cafe at the boathouse.

Refunds / Transfers

Please ensure you read and agree to the Votwo Events terms and conditions when you enter the event. In brief, the refund policy is as follows:

Any event entry cancellation received by email to [email protected] more than 14 days prior to the event date will receive a 50% refund or transfer of entry fee towards another votwo event (£5 transfer fee applies). Only emailed cancellations are acceptable. Cancellations made in the 14 days prior to the event start date will not be eligible for any refund or transfer.

Reviews

Verified Purchase

A 'verified' purchase review means that we've verified that the person writing the review purchased their entry to this race on findarace.com.

  • 5
  • 4
  • 3
  • 2
  • 1

4.5

21 reviews

JE
Jonathan

·10 days ago

Great event for all whether a novice or experienced. Pre event details sent out with clear information and well organised on the day. Car free bike and run courses and overall a great atmosphere.
HD
HELEN

·10 days ago

This was my first triathlon and I loved it! The event was really well organised and the course was perfect for a newbie. Will definitely be booking this event again.
SW
Sarah

·11 days ago

Friendly relaxed well organised race and Dorney is a great venue. My first race with Votwo events and will definitely do another!
MB
Marie

·11 days ago

This really is a great venue for a triathalon. I have taken part in three events here now and they have all been very well organised. The event crew are all helpful and friendly and they make you feel comfortable when you are already nervous. Will definitely be back.
NB
Nigel

·11 months ago

I love these races. Off road, so no horrid early hours start. Officials are both efficient and out to provide a fun day out. Good quality facilities and marshaling.
LO
Laura

·11 months ago

A good event in a great location, with onsite parking. I felt very safe in the water, with plenty of safety crew overseeing the competitors. The pre race briefing was comprehensive and very clear. On the downside, Transition was chaotic, with competitors from all the different events mingled in together. I would suggest this needs to segregated by event to ensure later competitors getting ready, do not obstruct racers progressing through Transition. At the finish there was no water or drink which I felt was poor. However, I would do this event again.
Trevor avatar
Trevor

·11 months ago

Excellent venue for Triathlon events. Pan flat bike and run routes on dedicated closed road. Despite the bike route being 8 loops, there is plenty of width for multiple people to overtake at the same time, so no bottle necks. I was surprised at the number of people getting punctures & mechanicals (at least 10 out of 340), perhaps the course needs a road sweeper put over it once a year.
DF
Debbie

·a year ago

Fantastic weekend, we travelled down from Yorkshire Saturday, and stayed in a hotel. Arrived at the venue, easy to register and rack up in transition. The guy giving the pre start information was hilarious, put everyone at ease. The course is fabulous, good instructions, well worth taking part. This is my second time at Dorney Lake, and it wont be my last
AB
Abigail

·a year ago

The race was well set up and the staff were friendly. The flats are great and at the top of the lake it’s so quiet it felt like I was going on a woodland ride! The spectator spaces were okay but there weren’t any seats which isn’t great for those with access issues! Also we couldn’t find the place for the life of us - more detailed instructions to get from the station to the venue by bike are entirely needed and weren’t provided.
BH
Ben

·a year ago

Organisation of the race was nearly perfect. Signage to the event was really good, athlete check in was super smooth. I really liked the security checks for entry into and out of the transition area. The only thing that needs to be improved is the transition area itself. Was chaos with athletes racing and also athletes in later waves setting up. There were a lot of issues with people putting bikes too close to others too, I came back into t2 and struggled to re rack my bike because somebody put there bike too close. Maybe setting out sections with tape on the bar for each athlete would make it better and easier. Or set a section for each wave. Overall event was really well run hence the 4 stars. First one done onto the next one
AP
Astrit

·a year ago

Great event very well signed, clean, plenty marshals to help and good facilities
CM
Chris

·a year ago

Great event! Lovely location, very well organised, perfect conditions. Highly recommend!
Robert avatar
Robert

·3 years ago

Very well organised. Ideal location for beginners. Fast, flat bike and run courses. Lake swim is excellent as the visibility is very good. I’ve done this event quite a few times over the years. Things to improve - more staff for food places. Queues were long. Can’t fault the event at all though and in such a beautiful setting.
MC
Max

·3 years ago

Great day for a very nicely organized triathlon! Access to the site was difficult if you don't have a car so maybe something to address for the next editions! Thanks for the great event!
AH
Alexandra

·3 years ago

There was very little security in place in the transition area- anyone could walk in and out which was really concerning. When I came to leave at the end with all my stuff, the guy didn’t even check I had the right bike!! 1st event I’ve ever been to where there was no prize giving either. Day was okay and lovely venue. I’ve raced at Dorney before but it was far better organised so would unlikely return with this event organiser running it. Security of my kit is a big deal!
PR
Paula

·3 years ago

The location for the race is beautiful and was really well organised. All information was given when you arrive and was well signed which was perfect for me as it was my first race. The picture of the site map was quite pixelated so couldn’t work it out before I arrived which is the only reason I didn’t give 5 stars. Good facilities for supporters and allowed to bring dogs too.
HM
Harpreet

·3 years ago

Really well organised! The water was really clear, the bike and run course was lovely and flat. Event organisers were really helpful. My only suggestion would be numbering the bikes in transition areas for the triathlon and maybe a post race snack should be included in the price?
LM
Lucy

·3 years ago

Great venue, really well organised and good communication beforehand. Only drawback is that it's not the best venue for supporters, particularly on the bike leg.
Anna Agnethe avatar
Anna Agnethe

·3 years ago

Lovely venue for smashing your time, really enjoyed it. If you’re after podiums and freebies post-race this won’t be it though. GPS tracking is an extra £5
OB
Olivier

·3 years ago

I was a bit reluctant to sign up because I thought that 8 laps on the bike course would be a draft fest and dangerous. I was wrong. The competitors were well scattered so there was really no danger at all. I had a great time racing on a fast course. I highly recommend it, especially for beginners who will benefit from a friendly atmosphere and a small field.
MP
Martyna

·3 years ago

Great beautiful venue on Eton College grounds. Simple course layout for swimming, cycling and running. Course quite flat. Only comment - it would be nice if there was a bike tool station with a pump like in other events.
Add a review

Location

Eton Dorney Rowing Centre, Windsor, SL4 6, United Kingdom

Who's In

See who else did this event

JS

Jeremy Snead

View

Dorney Lake Triathlon

You might like

East Leake Triathlon

Loughborough, Leicestershire

East Leake Triathlon
Triathlon
SwimRun
Aquabike
29 Mar 26
£51.00 - £60.00
5.0 · 2 reviews

Cookie settings

Cookies are small text files that a website stores on a user's device, such as a computer or a smartphone. When a user visits a website, a cookie may be set to track information such as the user's preferences, login information, or items in a shopping cart. Cookies are not harmful and are typically deleted when a user clears their browser cache or the cookie expires.

Strictly necessary cookies are a type of cookie that is essential for a website to function properly. These cookies are necessary to provide services requested by the user, such as login authentication, shopping cart functionality, and other similar features.

Strictly necessary cookies do not require the user's consent, as they are essential for the proper functioning of the website.

Learn more about our Strictly necessary cookies

Tracking and targeting cookies are a type of cookie used by websites to collect information about a user's browsing behaviour across multiple websites. These cookies are often used for advertising purposes and can track the user's interests and some personal information.

Targeting cookies are used to display personalised advertisements to the user based on their browsing history, search history, and other online activity.

Learn more about our Tracking and targeting cookies