The Río Truful Truful (also written Truful-Truful) is a scenic river flowing through the heart of the La Araucanía Region of southern Chile, originating from Laguna Verde and coursing southward before joining the Zahuelhue River to form the Allipén River near the town of Melipeuco. A significant portion of the river runs through Conguillío National Park, draining the eastern slopes of the iconic Llaima volcano — one of the most active volcanoes in South America. The river's volcanic origins give it a distinctive character, with dramatic scenery, clear Andean waters, and the spectacular Truful-Truful Falls along its course. Fishing the Truful Truful means casting in one of Chile's most visually stunning settings, surrounded by ancient araucaria (monkey puzzle) trees, volcanic rock formations, and pristine Patagonian wilderness.