| River Ilen | |
|---|---|
| Origin | Mullaghmesha, Cork |
| Mouth | Celtic Sea at Spanish Island |
| Basin countries | Ireland |
| Length | 34 km (21 mi) [1] |
| Source elevation | 494 metres (1,620 ft) |
| Basin area | 301.7 km² (116.5 sq mi) |
The River Ilen is a river in West Cork, Ireland. It rises at Mullaghmesha mountain and flows southwards for 34 kilometres into the Celtic Sea.
Its five main tributaries are, the Saivnose, Coarliss, Achrinduff, Glounaphuca and Clodagh. It is listed as having Quality A water, which means its pollution levels are far below the national average. Fish found in the river include Brown Trout, Sea Trout and Salmon. The main settlement on the river is Skibbereen.