River Glenderamackin
| Glenderamackin | |
| River | |
 River Glenderamackin from Guardhouse bridge
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| Country | United Kingdom |
|---|---|
| Part | England |
| Source | |
| - location | Mungrisdale Common |
| Mouth | River Greta |
| - location | Threlkeld |
| - coordinates | 54°36′45″N 3°3′45″W / 54.61250°N 3.06250°WCoordinates: 54°36′45″N 3°3′45″W / 54.61250°N 3.06250°W |
  Location of the mouth within Cumbria
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The River Glenderamackin, the Glendermackin or Glendermackin Beck is a watercourse in Cumbria, England. It is a headstream of the Greta.
The river rises on Mungrisdale Common on Saddleback, 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 Glenermakan is recorded from 1278. The spelling Glendermakin is described in 1777.Glendermackin-beck is cited in 1778.
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.
The 'glendera' element is also present in the name of Glenderaterra Beck, which joins the River Greta shortly after its source.
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Wikipedia