The Tortum Gölü or Tortum Lake is a lake in the northeastern Turkish province of Erzurum, the water level of which was increased by 1.5 m by a concrete dam built in 1971-1972. The Tortum Gölü is located 10 km northeast of Uzundere and is traversed by the river Tortum Çayı. The dammed lake covers an area of 6.62 km².