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Thames Valley Spring 5K, 10K, 15K, Half Marathon & Duathlon

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Tickets £18–£55

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  • Official booking partner
  • Best price guarantee
  • Free cancellation protection
Take part in this fast and flat mixed-discipline event at one of the homes of the 2012 London Olympic Games. Great for first time participants and experienced racers alike, the course loops around the picturesque lake. Come to try for a PB or for the gorgeous scenery.

How to enter the Thames Valley Spring 5K, 10K, 15K, Half Marathon & Duathlon

  1. Olympic Duathlon

    Duathlon: Run 10km, Bike 40km, Run 5km
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  2. Sprint Duathlon

    Duathlon: Run 5km, Bike 20km, Run 5km
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  3. Super Sprint Duathlon

    Duathlon: Run 2.5km, Bike 12km, Run 2.5km
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  4. 5K

    Run 5km
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  5. 10K

    Run 10km
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  6. 15K

    Run 15km
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  7. Half Marathon

    Run 13.1mi
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Training Plans by Let's Do This - Thames Valley Spring 5K, 10K, 15K, Half Marathon & Duathlon

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Thames Valley Spring 5K, 10K, 15K, Half Marathon & Duathlon routes

5K/10K/15K/Half Marathon

The course starts and ends at the impressive boathouse overlooking the lake.

Runners will set out on a pan flat 5km loop around the iconic lake. The terrain is a mixture of tarmac paths and closed, traffic free roads.

The 5km run will be 1 lap, the 10km run will be 2 Laps, the 15km run will be 3 laps and the half marathon will be 4.5 laps.

When you finish your race, competitors are required to proceed into the finish line funnel to collect your finishers medal.

As one of the flattest courses in the UK, this is a great chance to record a PB.


Super Sprint Duathlon: 2.5KM Run, 10KM Cycle, 2.5KM Run
Sprint Duathlon: 5KM Run, 20KM Cycle, 5KM Run
Standard Duathlon: 10KM Run, 40KM Cycle, 5KM run

First Run Course

  • The run will be an out and back loop measuring 2.5km.
  • The Super Sprint Duathlon run will be 1 loop, the Sprint Duathlon run will be 2 loops and the Olympic Duathlon run will be 4 loops.
  • 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 loop and the Sprint & the Olympic distances will be 2 loops.

Event Details

What’s Included
  • Free car parking
  • Marshalled course
  • Chip timed event
  • Bag drop
  • Medal
  • Prizes for 1st, 2nd, 3rd overall male and female, 1st Junior male and female, 1st Vet male and female
  • Refreshment stations
  • Ambulance services
Raceday Logistics


Duathlon site/registration opens

Event briefing

0830: Duathlon starts

0900: Site opens to runners

1035: 5K/10K/15K event briefing

1045: Half Marathon Event briefing & 5K/10K/15K starts

1100: Half Marathon starts

1200: Prize presentation for 5K/10K/15K

1230: Prize presentation for half marathon

Registration will take place by the main boathouse at the far end of the lake.

Please arrive at least 45 minutes before the start of the race in order to collect your race number and timing chip.

Duathlon: please arrive at 60 minutes before your race to rack your bike and 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.


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 runners.

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 parking on-site?

There will be ample parking available for both competitors and spectators.

Questions & answers

  • P

    Patrick H
    Hi there, myself and x2 others are planning on competing in the really race. How many teams generally take part in this race, i.e. 10k, 40k, 5k version?


    Steph E
    Hi there. Just to let you know that there are usually about 200 people running in this race.

Thames Valley Spring 5K, 10K, 15K, Half Marathon & Duathlon 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.

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