Event Overview


Now in its 22nd year, the London Triathlon has recently been voted for by YOU, our participants, as the UK’s Best Multi-Sport Event and we’re ready to make 2021 better than ever before! The 2021 London Triathlon will take place on Saturday 7 & Sunday 8 August and we’re very excited for what promises to be an AMAZING weekend.

Every year, thousands of people come to our iconic capital city to join our community of incredible triathletes taking on the challenge of the #LondonTri. The event takes place at the ExCel Centre, Royal Victoria Dock and has a unique urban route, giving participants the chance to swim, bike and run past London’s world-famous landmarks.

Are you a beginner looking to tackle your first triathlon? You’re not the only one! In 2019, an incredible one in three London Tri entrants were first timers. We hope next year will be no different: we’ve got the perfect events and distances for you! Why not dip your toe by trying one of our Super Sprint or Sprint distances? Or alternatively, grab your mates and join in the fun by entering a Sprint or Olympic Team Relay. Whatever you choose, here at the London Triathlon we’re ready to help you on your journey and bring you an incredible event day filled with plenty of fun that you’ll remember for years to come!

Are you ready to push yourself and take on a challenge? Why not join us for our Olympic distance event and experience the thrill of racing on closed roads past some of London’s most amazing landmarks? Mark the Olympic year with an Olympic distance triathlon and your very own medal moment guaranteed… there really is nothing like it! And if that wasn’t enough, this year at the London Tri, our Olympic Sunday distance will host the official ITU World Championship qualifiers meaning that athletes will be competing in this distance for their chance to represent Great Britain at the World Championships in Bermuda 2021.

Whether it’s your 1st or 101st event, everyone is welcome at the London Triathlon and we cannot wait to see you on the start line.


There are 4 adult distances available: Super Sprint, Sprint, Olympic and  Olympic Plus. Please see the table for a breakdown of each distance.

You can enter as an individual in any of the 5 distances or as part of a Team Relay in the Sprint and Olympic distance categories. For more information on this please visit the entries page of the website. 


The Weekend Warrior challenge is the ultimate test of endurance. Warriors must complete as many triathlons as possible, during racing hours, across both days of the event weekend. The winner is the Warrior who completes the furthest distance. The current record is held by Chris Dunn who completed a total distance of 246km over the weekend. Think you can beat it? Then sign up before places sell out, there are only 100 available for this challenge.


We’re delighted to announce that the 2021 London Triathlon will host an official ITU Standard Distance Triathlon World Championship Qualifier! This incredible addition to the event will see hundreds of athletes battling it out in the Olympic distance for their chance to represent Great Britain in their age group at the World Championships in 2022. For more information and for details on how to enter, please click here.



Before you start exploring this area, please make sure you read the British Triathlon Federation Competition Rules carefully. These rules are designed to make sure all athletes enjoy the event, but most importantly are safe whilst taking out on the course. Click here for the Rules.


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