river in England that rises at about 1,500 ft (460 m) in the Pennine range. It flows in a deeply entrenched course across the South Yorkshire coalfield past the city of Sheffield, where its basin forms the heart of the steelmaking district. From there the river flows northeastward past Doncaster, an ancient Roman crossing point and modern coal-mining centre, and the valley widens. The Don joins the Ouse at Goole after a course of about 70 mi (110 km).

river in Aberdeenshire, northeastern Scotland, rising in the Grampian Mountains, flowing generally eastward parallel to and north of the River Dee (Dee, River), and emptying into the North Sea at Aberdeen after a course of 82 miles (132 km). In its upper course it receives a number of short mountain streams, but in its lower stretches it flows more gently through a lowland area of agriculture and livestock raising. The main river town above Aberdeen is Inverurie.