The River Blackwater () rises in the
Cuilcagh
Cuilcagh () is a mountain on the border between County Fermanagh (in Northern Ireland) and County Cavan (in the Republic of Ireland). With a height of it is the highest point in both counties. It is also the 170th highest peak on the island of ...
Mountains, in the townland of Gowlan, Parish of Killinagh, Barony of
Tullyhaw
Tullyhaw (, which means 'the Territory of Eochaidh', an ancestor of the McGoverns, who lived ) is a Barony in County Cavan in Ireland. The area has been in constant occupation since pre-4000 BC. Located in the northwest of the county, it h ...
,
County Cavan
County Cavan ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Ulster and is part of the Northern and Western Region. It is named after the town of Cavan and is based on the hi ...
. It then flows in a south-east direction and ends in
Ballymagauran
Ballymagauran (), historically known in English as Ballymagowran and also sometimes spelled Ballymacgovern or Ballymagovern, is a hamlet and townland in the west of County Cavan in Ireland. Townlands.ie: Ballymagauran Townland, Co. Cavan. http ...
Loug
It has a fish population of brown trout, pike and perc
The earliest mention of the river is in poems in the Book of Magauran dating to the 1350s.
[L. McKenna, ed., tr. (1947), "The Book of Magauran"]
References
Rivers of County Cavan, Blackwater
{{Cavan-geo-stub