Dorney Lake Winter Half Marathon

Run 13.1mi

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If you want a a pb Half Marathon then look now further. Its the flattest course in the UK!

The race takes place on Dorney Lake, with flat roads and smooth paths, completely traffic free, running 4.5 laps of the scenic lake. Chip timing will be in operation for accurate splits and finish times. This event at Dorney Lake is fully licensed and certified by UK Athletics to provide 100% accurately measured courses. This means that any time you achieve on these courses can be used for any future event or championship that might require a qualification time.

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 Half Marathon

  1. Half Marathon

    Run 13.1mi
    Event passed
What’s Included


There will prizes for 1st, 2nd, 3rd Overall male and female, 1st Junior male and female, 1st Vet male and female.

Bespoke Medals for ALL finishers.


  • Onsite car park
  • Chip timing
  • Sports cafe
  • Friendly marshals
  • Free parking
  • Live to web results
  • Secure baggage area
  • Ambulance services
  • Toilets
  • 5m public liability
  • Music
  • Bespoke Medals
  • Great location
  • Prizes
  • Great event
  • Great atmosphere
  • Onsite retailers
Raceday Logistics

The event location is one of the most iconic 2012 London Olympic Games venues, which hosted the rowing and canoe disciplines.

Dorney Lake, Eton College Rowing Centre is conveniently located along the M4 Motorway, only 20 mins from London and 15 mins from the M25 and M40 motorways.

The event will have full car parking facilities available, which will be in operation to allow participants to come and go, whilst the event is still taking place and makes it perfect for spectators and family to attend and soak up the atmosphere. Food and drinks will also be available through our catering facilities, plus fun and games for kids of all ages!!!


The minimum age to take part in this event is 17 years old on the day of the event.

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Dorney Lake Winter Half Marathon weather forecast

Foggy overnight.

Predicted highs
Predicted lows
IconLight breeze possible, up to 7mph

Dorney Lake Winter Half Marathon 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