Take on Challenge London 2024, formerly London Triathlon, the world's biggest city centre triathlon open to all abilities . With various distance and relay options, there's something for everyone.
Note; the date is subject to final approvals and therefore could change.
Event details
Sunday 28 July 2024
ExCeL London, Royal Victoria Dock
Fundraising pledge: £450
Registration fee: £25
About Challenge London
Challenge London, formerly know as The London Triathlon, is multi-discipline sport consisting of swimming, cycling and running over various distances and can be completed as an individual or a team.
Challenge London distances
Take on the distance of your choice in London – Super Sprint, Sprint or Olympic. You can compete as an individual or a team.
Individual distances:
- Super Sprint - 400m swim, 10km cycle and 2.5km run
- Sprint - 750m swim, 20km cycle and 5km run
- Olympic - 1.5km swim, 40km cycle and 10km run
Relay distances:
- Sprint Relay - 750m swim, 20km cycle and 5km run
- Olympic Relay - 1.5km swim, 40km cycle and 10km run
Join as an individual
Registration for charity places at Challenge London 2024 has not yet opened, however please complete the register your interest form below and we will be in touch about places in the 2024 event.
Take on the world's largest triathlon and challenge yourself to a Super Sprint, Sprint or Olympic distance.
- Registration fee: £25
- Fundraising pledge: £450 (excluding gift aid)
Sign up as a team
Registration for charity places at Challenge London 2024 has not yet opened, however please complete the 'register your interest' form below and we will be in touch about places in the 2024 event.
Not sure about taking on the full distance yourself? Take on Challenge London with a Sprint Relay or full Olympic Relay distance as a team.
Registration fee: £25 per participant
Fundraising pledge: £650 as a team (excluding gift aid).
Please note: To sign up as a team all individuals need to register separately, with one person nominating themselves as Team Captain. The Team Captain will receive the race pack for the whole team. Please choose a team name and put this into the form for each individual so we can ensure we're contacting you with all the correct information.
Join with your own place
If you are lucky enough to secure your own place for the Challenge London 2024, you can still join our team and help raise money for Great Ormond Street Hospital. You'll get all of the same benefits and support, but won't have a minimum fundraising target to meet.
When is Challenge London?
Challenge London is taking place on Sunday 28 July 2024 (subject to final approvals) at ExCeL London, Royal Victoria Dock.

Take on Challenge London for GOSH
"I found the triathlon physically hard but so rewarding. I feel so proud to have finished it and I loved training for it; it gets you so fit.
I would say to anyone thinking of doing it for Great Ormond Street Hospital Children’s Charity, do it! I am 54 this year and doing my second triathlon, and when you think about the children at GOSH, it is nothing compared to what they go through. So go for it!"
John, London Triathlon participant.
Take on Challenge London for GOSH and you'll receive:
A GOSH top to wear on the day.
Online training guides and advice from top Triathletes.
Invites to exclusive triathlon training events.
The chance to win exclusive gear and prizes.
Encouragement along the route from our cheer team.
Hospitality on the day.
Fundraising advice, ideas and materials.
Dedicated support from GOSH Charity's Challenge Events team.