Slate River (Ireland)
|Native name||An Tarae (Irish)|
|⁃ location||Ballynafagh Lake, County Kildare|
|⁃ elevation||86 m (282 ft)|
|Celtic Sea at Waterford Harbour via Figile and Barrow|
|⁃ average||0.037 m3/s (1.3 cu ft/s)|
The river was historically known as the Clashaghbane River.
Slate River rises near Ballynafagh Lake in Prosperous and flows southwest, passing under the R403 road at Graigues. It continues westward parallel to, and north of, the Grand Canal. The Slate passes under the Grand Canal via the Derrymullen aqueduct and is bridged by the R415 at Littletown. The Slate River continues through Ballyteague Forest and passes by the Lullymore Heritage and Discovery Park on the Bog of Allen. It passes through Rathangan, County Kildare where it passes under Rathangan Bridge, part of the R401. There is also a footbridge downstream of this bridge, and another bridge (for the R414) at Rathangan Demesne.