The South Burn is a small river in County Durham

County Durham

County Durham is a ceremonial county and unitary district in north east England. The county town is Durham. The largest settlement in the ceremonial county is the town of Darlington...

, 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...

. One branch of the river has its source on Waldridge Fell

Waldridge Fell

Waldridge Fell is a Site of Special Scientific Interest located immediately south-west of Chester-le-Street in the northern part of County Durham, England. It is one of the largest areas of lowland heath in County Durham and contains the only lowland valley-mire in the county...

, the other (and longer) branch, known as Black Burn, rises on the northern slope of Barras Hill, north-east of Sacriston

Sacriston

Sacriston is a village and civil parish in County Durham, England, situated north of the city of Durham.Although the area has been populated since the Bronze Age, the first recorded settlement dated back to the 13th century to Sacristan's Heugh. According to old maps it was once known as...

 village.

The lower course of the burn occupies an incised valley, Southburn Dene, from which it emerges to cross the floodplain

Floodplain

A floodplain, or flood plain, is a flat or nearly flat land adjacent a stream or river that stretches from the banks of its channel to the base of the enclosing valley walls and experiences flooding during periods of high discharge...

 of the River Wear

River Wear

The River Wear is located in North East England, rising in the Pennines and flowing eastwards, mostly through County Durham, to the North Sea at Sunderland.-Geology and history:...

, into which it flows just south of Chester-le-Street

Chester-le-Street

Chester-le-Street is a town in County Durham, England. It has a history going back to Roman times when it was called Concangis. The town is located south of Newcastle upon Tyne and west of Sunderland on the River Wear...

.

Part of the river's valley is included in the Waldridge Fell Site of Special Scientific Interest

Site of Special Scientific Interest

A Site of Special Scientific Interest is a conservation designation denoting a protected area in the United Kingdom. SSSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in Great Britain are based upon...

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