Lago Viedma is one of Patagonia's most dramatic and remote fishing destinations, stretching approximately 80 kilometers in length across the Santa Cruz Province of Argentina, near the Chilean border. This massive periglacial lake — the second largest perennial lake located entirely within Argentina — was carved by glacial forces and continues to be fed by glacial meltwater, giving it the cold, clear, and often turbulent character that defines Patagonian fishing at its finest. Situated near the iconic Andean peaks of Cerro Torre and Fitz Roy, and adjacent to the adventure town of El Chaltén, Lago Viedma offers anglers a world-class fishery set against one of the most spectacular mountain landscapes on earth. The lake receives inflow from several rivers and streams, most notably the Río de las Vueltas, and is connected to Lago Argentino via the Río La Leona — a corridor that plays a critical role in the movement of fish between these two great lake systems.