River Glenderamackin

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River Glenderamackin - geograph.org.uk - 777034.jpg
River Glenderamackin from Guardhouse bridge
Country United Kingdom
Part England
 - location Mungrisdale Common
Mouth River Greta
 - location Threlkeld
 - coordinates 54°36′45″N 3°3′45″W / 54.61250°N 3.06250°W / 54.61250; -3.06250Coordinates: 54°36′45″N 3°3′45″W / 54.61250°N 3.06250°W / 54.61250; -3.06250
Location of the mouth within Cumbria

The River Glenderamackin is a river in the county of Cumbria, England.

The river rises on Mungrisdale Common and drains much of the eastern and southern sides of Blencathra.

The river runs east, then north before sharply turning south at the village of Mungrisdale, skirting almost all around the bottom of Souther Fell.

Latterly, the river turns west at Lowside and is soon swelled by the waters of Mosedale Beck. The Glenderamackin continues past Threlkeld, at which point it conjoins with St. John's Beck to form the River Greta.


The name "Glenderamackin" is of Brythonic derivation and is cognate with the Welsh glyndwfr y mochyn, meaning 'the river valley (glyndwfr) of the pig (mochyn)'.

This etymology is supported by the etymology of Mungrisdale, through which the river flows, featuring the same meaning from Norse.[1]

The 'glendera' element is also present in the name of Glenderaterra Beck, which joins the River Greta shortly after its source.


  1. ^ Names of Rivers in Cumbria. Retrieved 11 September 2006.