For those of you looking to push your swimming boundaries, our Challenge Swims are designed to do exactly that. Join us in South Africa and (weather permitting) complete a relay swim to Robben Island; swim 15km from island to island in the cold but stunning waters of the Scillies; or, take on a marathon swim (in a relay or as a solo) and swim the 15km length of turquoise Lake Annecy in France.