Betws-y-coed railway station is on the Conwy Valley Line, which runs between Llandudno and Blaenau Ffestiniog. It is situated 15+1⁄2 miles (24.9 km) south of Llandudno Junction.

The Conwy Valley line is a railway line in north-west Wales. It runs from Llandudno via Llandudno Junction 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. The line also provided goods facilities for the market town of Llanrwst, and via the extensive facilities at Betws-y-Coed on the London to Holyhead A5 turnpike road it served many isolated communities in Snowdonia and also the developing tourist industry. Although only a little over 27 miles (43 km) between Llandudno and Blaenau Ffestiniog, the journey takes over one hour, largely due to the sinuous and steeply graded nature of the route taken. Most of the stations along the line are treated as request stops.