 Above the hamlet of Trinafour the river is impounded behind Errochty Dam as Loch Errochty.The Bruar Water arises from the confluence of several headwater streams at OS grid ref NN 819804 and flows southwards through Glen Bruar for several miles.to the northeast of the village of Calvine it drops over the Falls of Bruar and shortly afterwards enters the Garry on its left bank.