The Conwy Valley Line (Welsh: Llinell Dyffryn Conwy) is a railway line in north Wales. It runs from Llandudno via Llandudno Junction (Welsh: Cyffordd Llandudno) to Blaenau Ffestiniog, and was originally part of the London and North Western Railway, being opened in stages to 1879. The primary purpose of the line was to carry slate from the Ffestiniog quarries to a specially built quay at Deganwy for export by sea.