This great Argentinean - Chilean lake (General Carreras in Chile) is for his extension the second one of South America, after the Titicaca. It has 2.240 km2, of which 881 correspond to the Argentina. The blue waters, intense in his center, clear up to the turquoise on his coasts. The continuous winds provoke a strong swell that is tamed in his beaches of boulder.

The lake offers a variety of fish composed of salmons, trout's and "percas", which constitutes another important resource for the zone.
The plateau environment is reflected in all his horizon; not this way in his extension, General Carreras, as it penetrates in the mountain chain, has sectors of steep rocky hills. It drains off in the Pacific Ocean by the river Baker, the most deep of Chile.

The temptation of navigating the lake and this river towards the ocean is old: it attracted a German ex-sailor and book-keeper of a Chilean ranch, German Brunswig, in 1922. He sailed in canoe up to the "Saltos Grandes", impossible to pass.

With the years, others repeated the experience. Werner Schad, a frequenter of the Patagonian rivers of white waters, with his boat proved luck in 1989 and advanced up to the jumps.

The Lake Buenos Aires was discovered by Carlos Maria Moyano, geographer and one of the most well-known Patagonian explorers. One of his trips was realized to plan the route of the cattle. In order to bring cattle of the north, he continued the route of the Englishman Musters and joined the santa Cruz southest point and the Chubut valley.
Moyano, with good relation with the baqueanos tehuelches, came to the lake accompanied of Creoles, two Frenchmen, 55 horses and 15 hunting dogs, essential. For the agreeable sensation that the lake produced on him and in use of his right as the first discoverer, gives the name of Buenos Aires.

Later the lake was studied by the scientist Perito Moreno and his collaborator the ing. Palavicini.