The Llanberis Lake railway is built on the track bed of part of the 4ft gauge Padarn Railway, which from 1843 to 1961 carried slates from Dinorwic Quarry, Llanberis, to Port Dinorwic on the Menai Strait. After the Padarn Railway closed the interal 1' 10.75" gauge quarry lines continued to be used until 1969 when the vast Dinorwic quarry finally closed. Several of the locomotives from the quarry were saved and in 1971 the Llanberis Lake Railway was born.
The railway has been recently extended to a new station on the edge of Llanberis. From there you ride to the Welsh Slate Museum, housed in the old quarry workshops. The railway runs from there along the shores of Llyn Padarn to Penllyn at the southern end of the lake. The collection of re-gauged "Quarry Hunslet" locomotives saved from the quarry lines still run on the line today.