The River Nith (Scottish Gaelic: Abhainn Nid; Common Brittonic: Nowios) is a river in south-west Scotland. The Nith rises in the Carsphairn hills of East Ayrshire, more precisely between Prickeny Hill and Enoch Hill, 4.4 miles (7.1 km) east of Dalmellington. For the majority of its 70 miles (110 km) course it flows in a south-easterly direction through Dumfries and Galloway and then into the Solway Firth at Airds Point. The territory through which the river flows is called Nithsdale (historically known as "Stranit" from Scottish Gaelic: Strath Nid, "valley of the Nith").