River Inny (Leinster)

The River Inny (Irish: An Eithne) is a river within the Shannon River Basin in Ireland. The Inny is 40 miles (64 km) in length[1]

River Inny
River Inny, Ballymahon
EtymologyFrom the mythological figure Ethniu
Native nameAn Eithne
Physical characteristics
  locationLough Sheelin, County CavanLongford
MouthRiver Shannon
Lough Ree
Length89 kilometres (55 mi)
Basin size1,254 km2 (484 sq mi)
  average18.4 m3/s (650 cu ft/s)
Basin features
River systemShannon

It begins as a stream on Patrickstown hill, one of the peaks which form the Loughcrew complex of megalithic tombs, near Oldcastle in County Meath and marks the boundary between Meath and Cavan for about four miles before it enters Lough Sheelin in County Cavan. From Lough Sheelin it forms the boundary between Westmeath and Cavan, and flows under the bridge of Finea into Lough Kinale where counties Cavan and Westmeath meet Longford. From there it forms much of the boundary between Longford and Westmeath but enters Westmeath near Streete and flows into Lough Derravaragh. It then flows near the village of Ballinalack and crosses into County Longford near Abbeyshrule, where the Whitworth aqueduct suspends the Royal Canal above the river, and pumps supply the canal with water. At nearby Tenelick the mythological Princess Eithne drowned in the rapids, giving her name to the river,[2] which powered two mills here for many years. It continues past Newcastle House to Ballymahon, the largest town located on the Inny. It again forms the county line between Longford and Westmeath, flowing westwards into Lough Ree to meet the boundary with County Roscommon. From there it becomes part of the River Shannon, flowing through Athlone to enter the Atlantic Ocean.[3]

See also


  1. Notes on River Basins, Page 64
  2. "Fishing and the River Inny". Longford.ie. Longford County Council. Archived from the original on 18 May 2015. Retrieved 15 May 2015.
  3. "The River Inny". Ireland Reaching Out. Archived from the original on 10 February 2015. Retrieved 9 February 2015.

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