Flowing out of the glacially formed Lago Curruhué within Parque Nacional Lanín in the Huiliches department of Neuquén Province, the Río Curruhué is a roughly 50-kilometer tributary of the renowned Río Chimehuin. The river drains the Lago Curruhué system — two lakes sharing the same name nestled close to the Cordillera de los Andes — and winds through Andean foothill terrain before joining the Chimehuin in its middle valley. The name "Curruhué" translates from the indigenous language as "lugar oscuro," or dark place, a fitting description for the shadowed, forested valleys through which this river travels. Sitting within and adjacent to Parque Nacional Lanín, the Río Curruhué offers anglers a scenic and productive fishery in one of Patagonia's most celebrated trout regions, with clear Andean waters and a diverse mix of trout species drawing fly fishers and spin anglers alike.