London's marathon of swimming. Hosted at the London Aquatics Centre in the Queen Elizabeth Olympic Park. Swimming now has its own marathon!
08:00
£109
Age 18 & over
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.
Marathon Swims format
You'll get 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.