The Kadisha River or Nahr Abu Ali is a river in Lebanon. It runs 45 kilometres (28 mi) east to west from the Kadisha grotto, halfway between Bsharri and the Cedars of God, to the Mediterranean Sea at Tripoli. The river runs along the Kadisha Valley, carving out deep gorges.

In Zgharta, in the Zgharta District the Kadisha river originating from the Kadisha grotto merges with the Rachiine and Jouit river that source from the town of Rachiine and Ehden respectively where it becomes the Abu Ali river that passes through Tripoli, Lebanon.

Walled and partially covered on its passage through Tripoli, the river is very polluted.^[1]