Lake Petén Itzá is a lake in the northern Petén Department in Guatemala. It is the third largest lake in Guatemala, after Lake Izabal and Lake Atitlán. It is located around 16°59′0″N 89°48′0″W. It has an area of 99 km², and is some 32 km long and 5 km wide. Its maximum depth is 160 m.