Be part of the world's largest triathlon, with over 30,000 spectactors cheering you on as you swim, bike and run through the capital.
About the race
Each year 13,000 participants run, cycle and swim their way through this iconic race. Whether you're a seasoned athlete or looking to take on a new challenge, the London Triathlon is a fantastic personal achievement and will be a day that will live long in your memory.
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Take on the London Triathlon
You'll take in great swathes of the city as you swim in the Royal Docks, run through the Docklands and cycle into the centre of town.
Nominate a friend
Keen to take on the race but don't want to do it alone? Nominate a friend - just tag them on social media.
My top tips
"This year I took on the London marathon for MQ, to help raise money for ground-breaking research into mental health. Here's what I learnt."