The River Don is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in Lancashire

Lancashire

Lancashire is a non-metropolitan county of historic origin in the North West of England. It takes its name from the city of Lancaster, and is sometimes known as the County of Lancaster. Although Lancaster is still considered to be the county town, Lancashire County Council is based in Preston...

, England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

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Rising on Peacock Hill as Hey Stacks Clough, the stream

Stream

A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill , kill, lick, rill, river, syke, bayou, rivulet, streamage, wash, run or...

 runs westwards to Black Clough Head where it collects Tom Groove and becomes Black Clough.

Black Clough continues past Robin Hood's House to Rapes Hole.

Now known as Thursden Brook, the river passes by Cockridge Copy and into the Thursden Valley north east of the town

Town

A town is a human settlement larger than a village but smaller than a city. The size a settlement must be in order to be called a "town" varies considerably in different parts of the world, so that, for example, many American "small towns" seem to British people to be no more than villages, while...

 of Burnley

Burnley

Burnley is a market town in the Burnley borough of Lancashire, England, with a population of around 73,500. It lies north of Manchester and east of Preston, at the confluence of the River Calder and River Brun....

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Thursden Brook becomes the River Don at Cockden Bridge and runs through Scrogg's Wood near Heasandford, flowing into the River Brun

River Brun

The River Brun is a river in eastern Lancashire.Rising at the confluence of Hurstwood Brook and Rock Water at Foxstones Bridge near the village of Hurstwood, the river runs north west towards the town of Burnley.The river passes through the artificial Rowley Lake near Rowley Hall and collects...

at Netherwood Bridge.