The Río Calcurrupe is a world-renowned fly fishing destination tucked into the temperate rainforest landscape of Chile's Los Ríos Region. Approximately 13 to 15 kilometers in length, the river originates from Lago Maihue near the town of Futrono and flows westward along the Futrono Fault before emptying into Lago Ranco, of which it is the primary tributary. With an estimated flow of 100 to 160 cubic meters per second, the Calcurrupe carries crystal-clear, cold, oxygen-rich water fed by snowmelt from the Andes, creating ideal conditions for trophy-sized trout. The river traverses a stunning corridor of Valdivian temperate rainforest at the foot of Mount Llifén, passing through a landscape of rapids, pools, glides, deep winding ravines, steep banks, deadfalls, rock walls, and undercut banks. This is a river of genuine wilderness character — running far from roads with limited access — and fishing pressure remains low as a result, making it one of the most productive and unspoiled trout fisheries in all of Patagonia.