The Río Limay is one of the most celebrated and productive trout fisheries in all of Patagonia, flowing approximately 380 kilometers northeast from its source at Lago Nahuel Huapi near Bariloche through increasingly arid high-desert steppe before meeting the Río Neuquén to form the Río Negro near the city of Neuquén. Originating at an elevation of 770 meters above sea level, the river drains a basin of over 61,700 square kilometers and passes through a dramatic landscape of red bluffs, volcanic geology, and open Patagonian steppe. Five major hydroelectric dams — Alicurá, Piedra del Águila, Pichi Picún Leufú, El Chocón, and Arroyito — punctuate the river's course, creating a series of reservoirs and transforming portions of the Limay into tailwater fisheries of exceptional quality. The river's crystal-clear waters, trophy-sized trout, and breathtaking scenery have earned it a global reputation among serious fly anglers, with many calling it one of the finest trout rivers in the world.