From Openwaterpediaopen water swimmer from Indonesia who was part of the world record setting team at the Lake Toba Festival - World Super Swim test event.
 World Super Swim
The Lake Toba Festival - World Super Swim is a 3-day series of circumnavigation relay open water swimming competitions around Samosir Island in North Sumatra, Indonesia. The 117.6 km World Super Swim is a series of 3 relay races in the clockwise direction around the Samosir Island. The relays start and end at Tabo Cottage in Tuk Tuk. The island is 920 meters above sea level in fresh water that is between 24–26ºC.
On Day 1, the teams will compete over a distance of 40 km. On Day 2, the competition distance is also 40 km. On Day 3, the distance is 37.6 km in Lake Toba, the largest lake in southeast Asia and the largest and deepest volcanic crater lake in the world. It was formed 75,000 years ago after an earth-splitting volcano eruption. It is 906 meters above sea level with an average depth of 450m. The lake has an island in the middle called Samosir.