Marathon Swims is the ultimate swimming challenge. Swimming now has its own marathon. Take on the Marathon 10k (as a team or individual), Half Marathon 5k or the 1k Challenge.
Marathon Swims 2020:
Marathon Swims 2020 will be 7 and 8 November 2020 at the venue of the London 2012 Olympic and Paralympic Games – the London Aquatics Centre, on Queen Elizabeth Olympic Park.