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Marathon Swims


The ultimate swimming challenge. Enter Marathon Swims, hosted at London Aquatics Centre, on Queen Elizabeth Olympic Park. Swimming now has its own marathon.

Marathon Swims 2023: Saturday 11 November

Enter now for London's Marathon of swimming. Take on the Marathon 10k, Half Marathon 5k, 1k Challenge or the Team 10k.

Charity Places:

Swim for our amazing charity partner Alzheimer's Society. Alzheimer's Society have HALF PRICE places in ALL challenge distances.

Most of our general entry places have sold out. There are just a few half-price charity places remaining, so be quick:

Marathon 10k - 4 places remaining

Half Marathon 5k - SOLD OUT

1k Challenge - 3 places remaining

Team 10k - SOLD OUT

Marathon Swims Virtual Challenge: 1-30 November

Enter now - FREE entry

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 2023

Date: Saturday 11 November 2023

London Aquatics Centre

London's marathon of swimming returns to the London Aquatics Centre in 2023. Take on the Marathon 10k, Half Marathon 5k or the 1k Challenge. Or team up with a friend to take on the Team 10k.

More information click here.

Enter here.

Marathon Swims Virtual Challenge 2023

1-30 November 2023

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 2023.

FREE to enter with medals and merchandise available for purchase.

Enter now



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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