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The UK’s most stunning duathlon at London's iconic Richmond Park awaits, with four challenges to choose from: the half, the full, the relay and the ultra. So whether you have big fitness aspirations for 2021, or just want to try something new next year, the London Duathlon has something for you.
C-19 Plan
Limelight Sports Club has confirmed that this event will be going ahead as planned on Saturday 24th Apr 2021 in accordance with the COVID-19 safety measures. Learn more

Review summary

5 Reviews
  • Course
  • Organisation
  • Atmosphere


Graham B
"This was a big thing for me. Having done only one very small Duathlon last..."


Leo K
"This was such an awesome event. It was my first ever Duathlon! It’s like a..."


"I cannot recomened this enough. It was the best event I have done this year or..."
See all reviews

How to enter the London Duathlon

  1. Ultra Duathlon

    Duathlon: Run 20km, Bike 77km, Run 10km
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  2. Full Duathlon

    Duathlon: Run 10km, Bike 44km, Run 5km
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  3. Half Duathlon

    Duathlon: Run 5km, Bike 22km, Run 5km
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  4. Duathlon Relay

    Duathlon: Run 10km, Bike 44km, Run 5km
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London Duathlon routes

The London Duathlon takes place in London's Richmond Park and is the largest event of its kind in the world. There are 4 different distances to choose from, details of which can be found below.

For full interactive maps of all these challenges, visit the Route page on the London Duathlon website:

Half Duathlon
Run 5km, Bike 22km, Run 5km

Full Duathlon
Run 10km, Bike 44km, Run 5km

Duathlon Relay
Run 10km, Bike 44km, Run 5km

Ultra Duathlon
Run 20km, Bike 77km, Run 10km

Event Details

What’s Included
    • Finisher's medal
    • Free event T-shirt
    • Event race pack (inc race number, bike number, timing chip)
    • Secure transition with numbered racking
    • Chip-timed event
    • Water stations throughout the course
    • Stunning closed-road course in Richmond Park
    • Distance marked
    • Course marshalled
    • Post-event hydration
    • Timing service including tracking, text message, and online lookup
    • Event Village
    • Toilets onsite
Raceday Logistics

Information on event day logistics including arrival times, kit checklists, start times and race information will be sent to all participants via email approximately 4 weeks before the event.

Kit List
  • Cycling jersey or running top
  • Leggings/shorts and socks
  • Running shoes and cycle shoes (if you have them)
  • Change of clothes for after
  • Full water bottle(s) for your bike
  • Spare inner tube, tyre levers, pump, bike tools
  • Race bib number attached to your race belt or top with your medical info complete
  • Bike bib number attached with cable ties
  • Transition wristband
  • Bike and helmet (with stickers attached)
  • 1 bag/box for transition area (max 50x50x50cm or 30L)
  • Car park pass (in your race pack if purchased)

Frequently Asked Questions

Is there an age limit for the London Duathlon?
All entrants must be at least 18 years old on race day to take part.
When will I receive my race number and pack for the London Duathlon?
Race numbers, bike and helmet stickers, electronic timing chip and security band will be posted to participants a few weeks before the event. If you have not received your race pack by the week before the event, please email us on [email protected]
Are there water stations during the London Duathlon?
There will be a number of water stations during each distance respectively. There will be water stations on the bike route but only for the Ultra participants - it is your responsibility to ensure that you have enough fluid to keep yourself hydrated on the bike leg.
Can I listen to my own personal music while I compete?
Unfortunately, no headphones are allowed. The safety of all participants is paramount and through wearing headphones you will be less likely to hear other competitors or marshals, which could become a hazard on route. You may be disqualified if you are seen wearing them, either on route or in transition.
Are disc brakes and disc wheels allowed?
Disc brakes are allowed as this is a non-drafting event. Disc wheels also permitted at the event, however this may be amended should the Event Organiser and Technical Official decide in the interest of safety, such as high winds.
How do I use a number belt?
A number belt is an elasticated belt that carries your race number and allows you to swap it from front on the runs to the back on the bike - it also means that you don't have to put safety pins through your clothing! You simply attach your number to the race belt and then put the race belt around you.
How early should I arrive?
Please arrive approximately 60 minutes before your start time to get your gear set up in the correct row in transition before warming up and making your way to the start line.



London Duathlon reviews (5)

4.9 out of 5 stars

  • Course
  • Organisation
  • Atmosphere
  • G

    Graham B

    Did the Full Duathlon in 2019

    This was a big thing for me. Having done only one very small Duathlon last year, I was a bag of nerves! I got myself a parking space at sheen gate and my first impression was, where do I go? Once in the village, I still felt very underwhelmed by the whole thing. Anyway, started the first run and the organisation and marshals started to make me feel more at ease. Loved the cycling part, very exhilarating course, yet challenging! Final run went better than planned. Once I crossed the line I was so pumped!! Loved it!! Amazing event in stunning area!! Can’t wait to do it all again!! Highly recommend!!!!
  • Did the Full Duathlon in 2019

    This was such an awesome event. It was my first ever Duathlon! It’s like a triathlon where you don’t get freezing cold and wet at the beginning. Will deff be signing up for 2020.
  • C


    Did the Full Duathlon in 2019

    I cannot recomened this enough. It was the best event I have done this year or maybe ever! Very well organised and what a beautiful location. I will be back!
  • Did the Full Duathlon in 2017

    I really enjoyed this event and it is one of the more interesting and demanding duathlons I think. I did find it quite expensive, as race entries go, however the organisation is very good, and it is an amazing chance to enjoy Richmond Park when it's completely closed to traffic. I would definitely recommend doing this event at least once. The best thing about the event was the atmosphere, the set up looks very professional and there is really good support, crowds and event village so it feels amazing to zoom through the barriers on your bike each lap, and also the finish chute from the run at the end. Also - having cycled around Richmond Park many, many times before, I expected the laps (being quite undulating and hilly) to feel like hard going, but the fact that it was traffic-free and the great atmosphere made it a surprisingly fast course!
  • Did the Ultra Duathlon in 2018

    Absolutely loved it. If you want an event to really push yourself an Ultra Duathlon is the one.It is a little repetitive doing laps of Richmond Park but actually knowing where you are, what you have coming up and how long to go is helpful.The last 10k is the hardest thing i've done so the sense of accomplishment was awesome!!!Event is set up well, transition areas are good.So local to London means easy for friends and family to come and watch
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