About
Marathon Swims
Marathon Swims is London's marathon of swimming. The annual event at the London Aquatics Centre, on Queen Elizabeth Olympic Park is in its 8th year. Swimming now has its own marathon.
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ENTER Marathon Swims 2026 today.
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Marathon Swims 2026:
Marathon Swims 2026 will be hosted at the LAC on Sunday 1 November 2026.
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CHARITY PLACES:
Our amazing charity partners Alzheimer's Society and Level Water have charity places in all distance challenges. Exclusive charity place sales operate between 5 March to 26 March 2026.
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BALLOTS:
A ballot will operate for the Half Marathon 5k and the Marathon 10k. Ballot launch date: Thursday 26 March 2026. The ballot will run until Thursday 30 April 2026. Entries notified in early May.
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GENERAL ENTRY:
General entry tickets for the 1k Challenge and Team 10k will open Thursday 26 March 2026.
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Marathon Swims Virtual Challenge:
The Marathon Swims Virtual Challenge runs between 1-30 November 2026. FREE entry to swim a Marathon 10k, Ultramarathon 25k or Ultramarathon 50k over 30 days. Register your interest to hear about this year's virtual challenge.​
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
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For further information - please see our FAQ's
Who will be the next to make it on to the Marathon Swims Hall of Fame?
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A big thank you to our Marathon Swims Partners
Enter
The Ultimate Swimming Challenge
Marathon Swims 2026
Date: Sunday 1 November 2026
London Aquatics Centre
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London's marathon of swimming returns to the London Aquatics Centre in 2026. Take on the Marathon 10k, Half Marathon 5k or the 1k Challenge. Or team up with a friend to take on the Team 10k. ENTER today
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Marathon Swims Virtual Challenge 2026
1-30 November 2026
Any swimming venue
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Marathon Swims Virtual Challenge will return! The challenge of the Marathon 10k, Ultra Marathon 25k or the Ultra Marathon 50k over the month of November awaits.
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FREE to enter with medals and merchandise available for purchase. Register your interest to hear about next year's challenge.​​​
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