Dassen Island is an uninhabited South African island in the Atlantic Ocean. It is situated about 10 km west of Yzerfontein and 55 km north of Cape Town. The flat and low-lying island measures about 3.1 km long northwest-southeast and 1 km wide, and is a proclaimed nature reserve.
Open Water Swimming
- Lewis Pugh completed an 11 km solo swim from Dassen Island to Ysterfontein in 2 hours 35 minutes on 21 March 1993.
- Jean Craven of Madswimmer completed a two-way crossing to Dassen Island in 6 hours 6 minutes on 12 May 2018, called the Dassen Island Challenge.
Dassen Island Challenge