Put in to the Confluence section of the Rio Azul near El Bolsón, Patagonia, Argentina. Matador Senior Editor David Miller notes, "This was the first river I've ever paddled, played, and swam in where the water was clean enough to drink. The entire Rio Azul watershed is born in the glaciers and snowfields of the Andes and the water is incredibly clear and pure." Shae Wiens