Lago General Carrera — known as Lago Buenos Aires on the Argentine side of the border — is one of Patagonia's most spectacular and productive fishing destinations, a vast glacial lake straddling the frontier between Chile's Aysén del General Carlos Ibáñez del Campo Region and Argentina's Santa Cruz Province. With a total surface area of 1,850 km², it holds the distinction of being Chile's largest lake and Argentina's fourth largest, and its western basin plunges to a maximum depth of 586 meters, making it one of the deepest lakes in South America. The lake's glacial origins give its waters a striking, deep turquoise clarity that is immediately recognizable and contributes to the exceptional visibility conditions that define fishing here. The indigenous Aonikenk people called it Chelenko — "stormy waters" — a name that speaks directly to the powerful winds and rapidly changing weather that anglers must respect. Surrounded by the Patagonian Andes, the lake drains westward to the Pacific Ocean via Lago Bertrand and the Baker River. The Carretera Austral, completed in the 1990s, opened the Chilean shore to tourism and fishing access, with lakeside towns including Puerto Río Tranquilo, Puerto Ingeniero Ibáñez, Puerto Guadal, Chile Chico, Puerto Murta, and Puerto Sánchez serving as bases for visiting anglers.