It rises at Mullaghmesha mountain and flows southwards for 37 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 and sea trout and Atlantic salmon.

This article related to a river in Ireland is a stub.