Lake Menéndez (Lago Menéndez) is a large lake in Chubut Province, Argentina. Lake Menéndez is in the chain of lakes in the Futaleufú River system of Argentina which via Yelcho Lake and the Yelcho River flows into the Pacific Ocean in Chile. Located in the Andes, Lake Menendez is Y-shaped, of glacial origin, and occupies two narrow valleys between glaciated peaks. The lake is in the Los Alerces National Park. There are no roads or other developments near the lake. Travel is by boat or foot. Lake Menéndez is noted for the extensive Alerce (Fitzroya) forests near the tips of its two arms.