Marathon Swims is the ultimate swimming challenge - swimming now has its own marathon.
Launched in 2017, the event has sold out each year. Take on the Marathon 10k, Half Marathon 5k, 1k Challenge or the Team (of 2) Marathon 10k in the pool of champions, the London Aquatics Centre, on Queen Elizabeth Olmypic Park.
Marathon 10k to 1k ChallengeKM
Event Location: London Aquatics Centre, London, E20 2ZQ