The River Camlin (Irish An Chamlinn - Crooked Pool) is a tributary of the River Shannon. Rising near Granard, it flows through Clonbroney, Ballinalee, and Longford Town before its two branch distributaries enter the Shannon.
The Camlin is navigable for part of its course. Its source is around the village of Abbeylara.
References
River Camlin Wikipedia(Text) CC BY-SA