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London's marathon of swimming


Marathon Swims


London's marathon of swimming. Hosted at London Aquatics Centre, on Queen Elizabeth Olympic Park. Swimming now has its own marathon.

Marathon Swims 2024: Saturday 9 November 2024

Save the date and be ready to enter the ultimate swimming challenge. Challenges include the Marathon 10k, Half Marathon 5k, 1k Challenge or the Team 10k. Marathon Swims sells out every year, so early entry is recommended.

Charity entry - opens Thursday 22 February 2024

All other categories - opens Thursday 29 February 2024 (including the Marathon 10k ballot)

To be first to hear about the launch of London's Marathon of Swimming in 2024, make sure you Register your interest.

Marathon Swims Virtual Challenge:

The Marathon Swims Virtual Challenge will return 1-30 November. This challenge will launch in June 2024.

Marathon Swims format:

We've innovated in swimming to give you instant, reliable results using RFID chip technology to deliver an engaging, exciting challenge event (for spectators as well as participants). No need for lap counting or endless laps of the same lane.


Watch our 30 second Marathon Swims format explainer video:

Checkout out our previous

Marathon Swims events at the London Aquatics Centre:

Find out more about the Marathon Swims event format

For further information - please see our FAQ's

Who will be the next to make it on to the Marathon Swims Hall of Fame?

A big thank you to our Marathon Swims Partners


The Ultimate Swimming Challenge

Marathon Swims 2024

Date: Saturday 9 Nov 2024

London Aquatics Centre

London's marathon of swimming returns to the London Aquatics Centre in 2024. Take on the Marathon 10k, Half Marathon 5k or the 1k Challenge. Or team up with a friend to take on the Team 10k.


Register your interest today and be first to hear when we launch

Marathon Swims Virtual Challenge 2024

1-30 November 2024

Any swimming venue

Marathon Swims Virtual Challenge is back! Take on the Marathon 10k, Ultra Marathon 25k or the Ultra Marathon 50k over the course of November 2024.

FREE to enter with medals and merchandise available for purchase.

Register your interest for 2024



Press and media (including latest press releases)

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Created and operated by Participation Sport Ltd.

Owned by The Swimathon Foundation

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