The Ceiriog Valley (Welsh: Dyffryn Ceiriog) is the valley of the River Ceiriog in north-east Wales. It is also the name of a ward of the County Borough of Wrexham. The ward is the largest ward of the county borough by area and forms a strikingly-shaped salient of the county borough between Powys and Denbighshire. Until 1974 the valley was part of the traditional county of Denbighshire; then it became part of the short-lived county of Clwyd, which was abolished in 1996. Part of the lower end of the valley extends into Shropshire, England. The Ceiriog Valley is some 20 km long and runs generally west to east, south of the Vale of Llangollen. The valley receives relatively few tourists despite being only a few miles from the A5 road and being described by British Prime Minister David Lloyd Ge