The River Don (also called River Dun in some stretches) is a river in South Yorkshire and the East Riding of Yorkshire, England.It rises in the Pennines, west of Dunford Bridge, and flows for 70 miles (113 km) eastwards, through the Don Valley, via Penistone, Sheffield, Rotherham, Mexborough, Conisbrough, Doncaster and Stainforth.It originally joined the Trent, but was re …

The River Ouse (/ ˈ uː z / OOZ) is a river in North Yorkshire, England.Hydrologically, the river is a continuation of the River Ure, and the combined length of the River Ure and River Ouse makes it, at 129 miles (208 km), the sixth longest river of the United Kingdom and (including the Ure) the longest to flow entirely in one county. The length of the Ouse alone is about 52 miles (84 km) …