High-altitude swimmer

noun - A high-altitude swimmer is an individual open water swimmer who participates in a relay or open water swimming competition or attempts at solo crossing at high altitude of at least 1,000 meters above sea level.

High Altitude Swimmers

Participants in the 10-mile Olympic Club Trans Tahoe Relay in Lake Tahoe (U.S.A.) - 1,897 meters
Participants in the 250m Gar Woods Polar Bear Swim in Lake Tahoe (U.S.A.) - 1,897 meters
Soloists of the 34.1 km 21.25-mile Lake Tahoe crossing (U.S.A.) - 1,897 meters
Participants in the Speedo Ice Swim Africa in Fraserburg, Northern Cape (South Africa) - 1,400 meters
Participants in the Mountain Swim Series (U.S.A.) - Solstice Swim - 1,524 meters
Participants in the Mountain Swim Series (U.S.A.) - Carter Lake Crossing - 1,755 meters
Participants in the Mountain Swim Series (U.S.A.) - Chatfield Classic - 1,654 meters
Jean Craven, Juandre Human, Hardi Wilkins and Megan Harrington-Johnson in the Ojos Swim on Mount Ojos del Salado (Chile) - 6,400 meters
Lynne Cox in Lake Titicaca from Bolivia to Peru - 3,812 meters (12,507 feet) (10 miles from the resort village of Copacabana in Bolivia to the village of Chimbo in Peru in 3 hours 48 minutes in 13-14°C (56-58°F) water in 1992)
Cristian Vergara from the Isla de la Luna to the Isla del Sol in Lake Titicaca (7 km in 2015)
Lewis Pugh in Lake Pumori on Mount Everest (1 km in 22 minutes in 2°C water at 5,200 meters in 2010)

Madswimmers doing high-altitude swimming at 5909m (19,386 feet) in a frozen lake on Mt Tres Cruces, a volcano in the Andes Mountains along the Argentina - Chile border in South America with the water temperature between 0.5 - 2ºC (32.9ºF - 35.6ºC). Jean Craven, Herman van der Westhuizen and Chris Marthinusen completed the 5-minute neoprened wild swim while Evan Feldman and Milton Brest swam in wetsuits and Robert Graaff and Juandre Human were unable to partake in the final swim due to medical restraints after a 6-hour hike up the volcano and a laborious creating of the small area to swim through the 20 cm thick ice covering.