© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Penrhyn Quarry Railway is a narrow-gauge railway constructed in the nineteenth century to serve the extensive slate quarrying operations at Penrhyn in Caernarfonshire, North Wales. The railway formed a vital part of the infrastructure supporting one of Britain's largest slate quarries, facilitating the transport of extracted slate from the quarry workings to processing areas and onwards to distribution points. The line represents a significant surviving example of industrial railway engineering associated with Welsh slate extraction, reflecting the technical sophistication required to manage the movement of heavy materials across challenging terrain. The railway remains a scheduled ancient monument, preserving evidence of the region's dominant nineteenth-century extractive industry and the specialized transport systems upon which it depended.
Penrhyn Quarry Railway is a scheduled monument protected by Cadw under reference CN417. View the official record →
Penrhyn Quarry Railway is a narrow-gauge railway constructed in the nineteenth century to serve the extensive slate quarrying operations at Penrhyn in Caernarfonshire, North Wales. It is designated a Scheduled Ancient Monument by Cadw under reference CN417.
Penrhyn Quarry Railway dates from the industrial period, and is classified as a railway. It is one of over 32,000 scheduled monuments protected across the UK.
Penrhyn Quarry Railway is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is CN417.
Several scheduled monuments lie within 10 km, including Carnedd Fach cairn (5.8 km), Dinorwic Quarry (6.3 km), Vivian Slate Quarry, Inclines, Walia & associated structures (6.4 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Penrhyn Quarry Railway's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Penrhyn Quarry Railway stands on Lower Cambrian Rocks (Undifferentiated), bedrock that formed in the Early Cambrian. The rock here is mudstone, siltstone and sandstone.