Lough Derg or Loch Derg is a lake in County Donegal, Republic of Ireland. It is near the border with Northern Ireland and lies about 7 kilometres north of the border village of Pettigo. It is best kno
The River Derg is a small river in Ireland. The river has its source in Lough Derg, in County Donegal, Republic of Ireland, and it flows into County Tyrone, Northern Ireland, east through Castlederg t
River Derg and the Ardstraw Bridge
River Derg on the Northern Ireland side of the border