The River Dee ( ga, An Níth) is a river in eastern

Ireland Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic Ocean, in Northwestern Europe, north-western Europe. It is separated from Great Britain to its east by the North Channel (Grea ...

, flowing from County Cavan to join the Glyde in County Louth.

Legend

In the ''

Táin Bó Cúailnge (Modern ; "the driving-off of the cows of Cooley"), commonly known as ''The Táin'' or less commonly as ''The Cattle Raid of Cooley'', is an epic from Irish mythology. It is often called "The Irish Iliad", although like most other early Iri ...

'', Cúchulainn fights Lethan at Ath Carpat ("chariot ford") on the river Níth. This takes its name from the Irish ''níth'', meaning "combat". The modern name Dee derives from the town of

Ardee Ardee (; , ) is a town and townland in County Louth, Ireland. It is located at the intersection of the N2, N52, and N33 roads. The town shows evidence of development from the thirteenth century onward but as a result of the continued dev ...

(''Baile Átha Fhirdhia'', "town of

Ferdiad Ferdiad (; also ''Fer Diad'', ''Ferdia'', ''Fear Diadh''), son of Damán, son of Dáire, of the Fir Domnann, is a warrior of Connacht in the Ulster Cycle of Irish mythology. In the ''Táin Bó Cúailnge'', Ferdiad finds himself on the side of t ...

's ford").

Course

The River Dee springs near Bailieboro in

County Cavan County Cavan ( ; gle, Contae an Chabháin) is a county in Ireland. It is in the province of Ulster and is part of the Border Region. It is named after the town of Cavan and is based on the historic Gaelic territory of East Breffny (''Bréifn ...

and flows in an easterly direction for through

County Meath County Meath (; gle, Contae na Mí or simply ) is a county in the Eastern and Midland Region of Ireland, within the province of Leinster. It is bordered by Dublin to the southeast, Louth to the northeast, Kildare to the south, Offaly to the ...

and

County Louth County Louth ( ; ga, An Lú) is a coastal county in the Eastern and Midland Region of Ireland, within the province of Leinster. Louth is bordered by the counties of Meath to the south, Monaghan to the west, Armagh to the north and Down to the ...

before entering the River Glyde at the village of