London triathlete dive in for the swim section

London Triathlon

The largest triathlon in the world and  the only triathlon to take place in central London. With five different distances, the London Triathlon has an option for everyone!

Event details

27-28 July 2019
Fundraising target
Registration fee

Whether you are a returning triathlete or considering taking it on for the first time, the London Triathlon could be the perfect tri event for you.

With five different distances, ranging from the SuperSprint (400m swim/10km bike/2.5km run) to the Olympic Plus (1,500m swim/80km bike/10km run), there really is something for people of all abilities. 

There are also relay options for teams of three so you can split the load and focus on your best sport. So what are you waiting for? We have a number of charity places available. 

For inspiration check out the official video.

Already got your own place?

Have you got your own place on this event but still want to be part of Team Marsden and raise money to help people with cancer here and across the world? Just get in touch and let us know. 

Got the team spirit?

Please let us know if you wish to take part as a team.

Your information will be used to process your enquiry regarding the event you are interested in.

We’d also love to keep you updated about how your support makes a difference and other ways you can help The Royal Marsden Cancer Charity. Please let us know how you would like to hear from us.

By email
By phone

If you’ve already told us how you’d like us to contact you, you don’t have to do so again. You can change your mind at any time by sending us a message or by calling 020 7808 2233.

Your details are safe with us. More information about how we protect your personal data is set out in our privacy policy and supporter promise.