Boyle River (Ireland)

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For the river in New Zealand, see Boyle River (New Zealand).
Boyle River
An Bhúill
Boyle River at Knockvicar.
Origin Lough Gara, County Mayo.
Mouth Atlantic Ocean via the River Shannon

The Boyle River is a river in Ireland. It flows from Lough Gara on the Sligo/Roscommon border and flows through the town of Boyle to Lough Key. From there is flows eastwards through the village of Knockvicar to the River Shannon at Lough Drumharlow, near Carrick-on-Shannon. The length of the Boyle River (from its source in Mayo to the Shannon) is 64.4km (40ml)[1]

Boyle River Basin[edit]

The Boyle River has its origins in the rivers Lung and Breedoge which flow into Lough Gara. The 29km (18mi) Lung River is fed by Urlaur Lough and Errit Lough on the Mayo/Roscommon border.[2][3]

On the bridge at Knockvicar

The river flow from the furthest reaches of the Boyle catchment to Limerick city has a measurement of 290 km (180ml).[4] When added to the Shannon's 97 km estuary this gives a total river flow of 387 km (240 ml), which makes it the longest river within the River Shannon basin (from source to mouth) - 26 km (16 ml) longer than the Shannon Pot source.[5]

Lung River at Crunnaun Bridge near Ballaghadereen Co. Roscommon

The area of the Boyle river basin is 653 km2[6]

Urlaur Abbey on L. Urlaur Co. Mayo


  1. ^ Notes on River Basins: Page 64[1]
  2. ^ Urlaur Lough [2]
  3. ^ Errit Lough[3]
  4. ^ River Habitat Survey, Fig. 2[4]
  5. ^ European Commission Rivers Map[5]
  6. ^ Biology and Management of European Eel (Anguilla anguilla, L) in the Shannon Estuary, Ireland[6]

Coordinates: 51°51′N 10°11′W / 51.850°N 10.183°W / 51.850; -10.183