| Boyle River | |
|---|---|
 Boyle River atKnockvicar. | |
 | |
| Native name | An Bhúill (Irish) |
| Physical characteristics | |
| Source | |
| • location | Lough Gara |
| Mouth | River Shannon |
• location | Lough Eidin |
TheBoyle River is a river in Ireland. Forming part of theShannon River Basin, it flows fromLough Gara on theSligo/Roscommon county border and thence through the town ofBoyle toLough Key. From there is continues eastwards through the village ofKnockvicar to theRiver Shannon atLough Drumharlow, nearCarrick-on-Shannon.The length of the Boyle River (from its source inCounty Mayo to the Shannon) is 64.4 km (40 mi).[1] The area of its basin is 725 km2.[2]
The Upper Shannon catchment, above Carrick-on-Shannon (area: 1,301 km2[3]), has two distinct reaches, the River Shannon (basin area:576 km2), which rises inCounty Cavan, and the Boyle River (basin area:725 km2), with its source in County Mayo, which have their confluence atLough Eidin/Drumharlow, approximately 4.7 km upstream of Carrick-On-Shannon.
The Boyle River has its origins in the riversLung andBreedoge, which flow into Lough Gara. The 29 km (18 mi) Lung River[4] is fed byUrlaur Lough andErrit Lough on the Mayo/Roscommon border.[5][6]
The river flow from the furthest reaches of the Boyle catchment toLimerick City has a measurement of 290 km (180ml).[7] When added to the Shannon's 102.1 km (63.5ml) estuary, this gives a total river length of392.1 km (243.5ml), which makes it the longest river within the Shannon River Basin (from source to mouth),31.6 km (19.5ml) longer than theShannon Pot source.[8]
53°57′30″N08°24′21″W / 53.95833°N 8.40583°W /53.95833; -8.40583