River Blackwater, County Cavan
The 883rd longest river in the world
The River Blackwater (Irish: Abhainn Dubh) rises in the Cuilcagh Mountains, in the townland of Gowlan, Parish of Killinagh, Barony of Tullyhaw, County Cavan. It then flows in a south-east direction and ends in Ballymagauran Lough.[1] It has a fish population of brown trout, pike and perch.[2] The earliest mention of the river is in poems in the Book of Magauran dating to the 1350s.
Flows through: Ireland.
River data from Wikidata (CC0); lengths normalised to a common unit.