Southern Patagonian Ice Field in the area, among which are the Upsala (765 km), Viedma (978 km) and Perito Moreno (258 km) in the Los Glaciares National Park in Argentina, and the Pío XI Glacier or Bruggen Glacier (1,265 km, the largest in area and longest in the southern hemisphere outside of Antarctica), O'Higgins (820 km), Grey (270 km) and Tyndall (331 km) in Chile. The glaciers going to the west flow into the fjords of the Patagonian channels of the Pacific Ocean; those going to the East flow into the Patagonian lakes Viedma and Argentino, and eventually, through the rivers "de la Leona"
Patagonian Expedition Race challenge, conducted in an environment where preparedness is everything and precision multi-discipline tools for the job are vital – exactly the principles on which our company was founded over 100 years ago." The race is also supported by the Chilean Government, with the aim of promoting sustainable adventure travel in Chilean Patagonia. Many local businesses provide additional essential support for the logistics of the event. The Patagonian Expedition Race entered an official partnership agreement with the Olympic Committee of Chile (Comité Olímpico de Chile, COCH) in October 2007. Although the event does not correspond to an Olympic discipline, the Committee