Río Negro is a stream flowing through the Los Lagos Region of Chile, situated at approximately 41°50′S, 71°58′W. This area of Chilean Patagonia is renowned for its pristine wilderness, dramatic volcanic landscapes, and exceptional cold-water fisheries. The Los Lagos Region is home to some of the most productive trout and salmon waters in South America, and Río Negro sits within a broader network of rivers and streams that includes well-known fisheries such as Río Puelo, Río Petroqué, and Río Pescado. The surrounding landscape is characterized by dense temperate rainforest, rugged terrain, and the clean, cold waters typical of Patagonian river systems. Nearby waters support rainbow trout, brown trout, Chinook salmon, and coho salmon, reflecting the rich salmonid fishery that defines this corner of Chile.