Productive areas include the dam face and discharge area of the Embalse Río del Rosario, where cooler, oxygenated water attracts trout. The numerous coves and inlets around the reservoir perimeter hold bass and pejerrey. In the river, the confluence of tributaries, deep pools below riffles, and undercut banks are reliable spots. The tailwater section immediately below the dam is a consistent producer due to stable temperatures and abundant food.