Pen-y-Mount Junction station is the northern terminus of the Welsh Highland Heritage Railway (WHHR) in Porthmadog, Wales.

It opened on 2 August 1980 at which time it consisted of a single platform with a run round loop and was intended to be a temporary terminus.

In 2000, the WHHR began construction of the WHR main line, under the terms of their 1998 agreement with the Festiniog Railway Company.

Under the terms of the 1998 agreement, they were allowed to use the new line and retain all revenue from it until the FR had finished constructing the remainder of the WHR.

It is hoped that in future the WHHR will have running rights over the FR-owned WHR mainline and that the station will become an interchange between the two railways.