The River Swale in Yorkshire, England, is a major tributary of the River Ure, which becomes the River Ouse, that empties into the North Sea via the Humber Estuary. The river gives its name to Swaledale, the valley through which it flows.
The river and its valley are home to many types of flora and fauna typical to the Yorkshire Dales. Like similar rivers in the region, the river carves through several types of rock and has features typical of both river and glacial erosion. The River Swale has been a contributory factor in the settlements that have been recorded throughout its history. It has provided water to aid in the raising of crops and livestock, but also in the various mining activities that have occurred since Roman times and before.
The river is said to be the fastest flowing in England and its levels have been known to rise 10 feet (3 m) in 20 minutes. Annual rainfall figures average 1800 mm p.a. in the headwaters and 1300 mm p.a. in the lower waters over a drop of 148 m in 32 km.
The Swale appears more rocky than the other rivers in the Yorkshire Dales, which is usually a characteristic of brown trout habitat, but there are grayling in the River Swale in substantial numbers. The other fishes include: Barbel, Chub, Dace, Bleak, Roach, Pike & Perch.
