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Dorney Lake Winter Duathlon & Run

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Tickets £22.50–£55

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  • Official booking partner
  • Best price guarantee
  • Free cancellation protection
Take part in this superb celebration of endurance events. Great for beginners and experienced athletes alike, the flat course tightly hugs the historic lake giving participants some stunning views. Come to race in the shadows of the Olympic rings or for the unique medal.

Review summary

17 Reviews
  • Course
  • Organisation
  • Atmosphere


Lee M
"I chose this course as part of my training towards other events but also..."


Naomi E
"THE BAD: Race instructions were clearly pinched from the triathlon as they..."


Robert C
"Great flat course as advertised, with water stops and gels every 2.5km or so...."
See all reviews

How to enter the Dorney Lake Winter Duathlon & Run

  1. Half Marathon

    Run 13.1mi
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  2. Super Sprint

    Duathlon: Run 2.5km, Bike 10km, Run 2.5km
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  3. Sprint

    Duathlon: Run 5km, Bike 20km, Run 5km
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  4. Olympic

    Duathlon: Bike 10km, Bike 40km, Run 5km
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  5. 10k

    Bike 10km
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  6. 5k

    Run 5km
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  7. 15k

    Run 15km
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Training Plans by Let's Do This - Dorney Lake Winter Duathlon & Run

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Dorney Lake Winter Duathlon & Run routes


First Run Course

  • The run will be an out and back course measuring 2.5km.
  • The Super Sprint Duathlon run will be 1 out and back lap, the Sprint Duathlon run will be 2 out and back laps and the Olympic Duathlon run will be 4 out and back laps.
  • Once completed, competitors will proceed into the RUN IN entrance of the transition area.

Bike Course

  • The course consists of approx. 5km laps up and down the side of the famous lake.
  • Super Sprint Duathlon will complete 2 laps, the Sprint Duathlon will complete 4 laps and the Standard Duathlon will complete 8 laps.
  • Please note that it is the competitors responsibility to count the number of laps they have ridden.

Final Run Course

  • The final run course is once again an out and back loop equal to 2.5km.
  • The Super Sprint distance will be 1 lap and the Sprint & the Olympic distances will be 2 laps.


  • The 5km, 10km, 15km & half marathon courses are laps around the famous rowing lake.
  • The course is fast and flat and takes place on tarmac paths and closed roads.
  • This is a perfect course for first time runners or those looking to get a PB

Event Details

What’s Included
  • Chip timed event
  • Finisher's medals
  • Secure baggage area
  • Refreshment stations
  • Aid stations and ambulance services
  • Marshalled course
  • Prizes for 1st, 2nd, 3rd overall Male and Female, 1st Vet (40+) Male and Female.
  • Free car parking
  • Toilets
Raceday Logistics


0800 All duathlon distances begin together

0900 Venue opens for 5km, 10km, 15km & Half Marathon events

1045 5km,10km, 15km & Half Marathon Start

Event Registration is located by the Main Marquee as you enter the lake on the right hand side. When you arrive at registration, a member of staff will give you your event number.

Duathlon competitors will then receive:
1. Bib number. To be worn on the front when you are running and back when you are biking.
2. Depending on the number of competitors, you may be asked to have your event number written on
your hand. Staff to write your number in permanent marker that washes off skin.
3. Bike number. To be stuck on your bike seat post.
4. Helmet number. To be stuck on the front of your helmet.
5. Timing chip. This is supplied with a Velcro band to secure to your ankle.

5km, 10km, 15km & Half Marathon competitors will receive their race number and timing chip.

Please arrive 60 minutes before the start of your race in order to complete the registration process.

Kit List

Duathlon competitors are expected to supply their own bike which is in good working order.

Helmets are also compulsory for the Duathlon


This is a great event for spectators. Not only is Dorney Lake one of the most recognisable venues from the London 2012 Olympic games, but the looped structure of the course means spectators should get a good view of competitors.

There are catering facilities available onsite in case you are feeling peckish.


The volunteers are what make this event special. If you would like to join this superb team of people, please email [email protected]

In return F3 events will offer you:

  • Free entries for yourself or a family member
  • Free food and drink provided at the event
  • Event clothing

How do I receive my race number?

Race numbers should be collected on the day as well as your timing chip.

Where can I find my results?

The results will be posted on F3 events website directly after the race. You will also receive a results email which will be sent to your email address after the event.

Is there an age limit?

Competitors will need to be 17 years old on the day of the event

Dorney Lake Winter Duathlon & Run weather forecast

Drizzle throughout the day.

Predicted highs
Predicted lows
IconHigh chance of rain
IconLight breeze possible, up to 9mph

Meet the organizer

F3 Events

Verified organizer

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F3 Events
Offering fun, friendly, family, fast and focused events across the South. F3 Events was set up in 2006 and has been one of the leading sporting event organisers along the Thames Valley for the past 10 years. Our mission is to organise, deliver and provide first class sporting events along the Thames Valley to aspiring athletes from complete beginners to elites athletes.

Dorney Lake Winter Duathlon & Run reviews (17)

3.8 out of 5 stars

  • Course
  • Organisation
  • Atmosphere
  • Did the Half Marathon in 2019

    THE BAD: Race instructions were clearly pinched from the triathlon as they instructed you to bring a bike!Collecting the numbers was a bit confusing as I didn't see any signage and there was a lot of finishing off triathletes around preparing for a presentation and doing their own post race stuff so it was all a bit baffling. Not that amused that F3events website described it as a "fully licensed and certified by UK Athletics" course, but didn't make it clear it's not got a UKA/runbritain race license so won't count on Power of 10 or RunBritain. Probably wouldn't have paid the 35 entry if I'd known that - you only get a generic sort of medal for it, so I'm not sure what the entry fee goes on.THE GOODThe car parking attendants on the day were very helpful at managing a mass of cars - be aware that you might end up parked about half a mile from the meeting area though as they park along the road once. Not many runners so no getting jostled and held up along the wayHad a 1.40 pacer, which was unusual and very helpful for me. Water stations well stocked and friendly volunteersDefinitely a flat course and lots of pb potential and I quite enjoyed knowing what was coming each lap so I could judge my pace
  • Did the Half Marathon in 2019

    Great flat course as advertised, with water stops and gels every 2.5km or so. Facilities before the start and after were also good, with use of boat house.
  • Did the Half Marathon in 2019

    Great race for all abilities. Flat course with great support. Ive done this event several times and hope to be back for more
  • Did the Half Marathon in 2019

    Expensive!!Didnt seem particularly well organised. Zero signage to help out with registration, start or finish areas. Joining instructions were useless- clearly a cut and paste from another event and course map was incorrect.Course was pretty mind numbing but that was to be expected with a 4 lap race.Not entirely sure where the 30+ entry fee went - other than to F3 events in profit.Much better organised and value for money events out there.
  • Did the Half Marathon in 2019

    I chose this course as part of my training towards other events but also because of the pb potential. I completed an Olympic duathlon back in November 18 so knew that the course was relatively flat. The race briefing was a little behind schedule although clear on the course to run and instructions provided. The atmosphere was also friendly and I chatted with a few people to see what their goals were and if they had run here before. The pack for the event was mixed which is great to see a blend of experience. The race itself was very good and easy to manage your pace in line with your strategy. I predominantly run trail events so it was a change for me to run multi laps on flat tarmac. Once set in, it is mainly 4 laps (not always great completing laps as there isnt much to see but that is not why i entered)so you chalk them off as you go, knowing that once lap 2 is out the way you are over half way round. My goal was to have a new pb and beat 1:32:44 so I was aiming for 1:30. Conditions were great on the day, not hot a and very little breeze. I finished on 1:29.04 so very happy. It is worth noting that the straight back to the boathouse is a little deceiving and felt very slightly uphill. Would I compete here again, yes I would. Very well organised as there were many events on the day and friendly competitors/marshalls alike.
  • Did the Half Marathon in 2019

    The event was very well set up and registration was very straightforward.Nice course, flat and scenic. I think it would be a beautiful run in the summer as it was a bit grey and chilly. But enjoyable none the less
  • Did the Half Marathon in 2019

    A no-nonsense extremely flat course, ideal for getting a HM PB (which I did -7mins). Really well organised and very close parking. Would thoroughly recommend this course.
  • Did the Half Marathon in 2019

    Event was very well organised, the course was accurately measured and pretty flat. There was water and gels on the course and the results were available immediately afterwards.Would definitely run it again.
  • Did the Half Marathon in 2019

    Course was OK but a bit boring as its juat 4 laps of a lake. Not the best organisation either leaving was a bit chaotic du to lack of people directing you. Also no way of getting your chipped time on line so I have no idea what it was. Just have to go by my own watch time.
  • Did the Half Marathon in 2014

    Great flat course, quite windy at times