The Río Caleufú is one of northern Patagonia's most captivating and rewarding fly fishing destinations, flowing approximately 60 miles through breathtaking Andean mountain terrain before emptying into the Alicura Reservoir. Formed by the confluence of the Río Meliquina and the Río Filo Hua Hum, the river runs west to east through a landscape that transitions dramatically from mountain to steppe, offering anglers an extraordinary journey through some of Argentina's most pristine wilderness. The water is remarkably clear, and the river's fast-flowing character, combined with its remote setting and wild trout populations, has earned it a well-deserved reputation among serious fly fishers from around the world.