 | This article needs additional citations for verification. (September 2020) |
 "Blondin" aerial cableways at Pen-yr-Orsedd in 2002 | |
| Location | |
|---|---|
  Pen-yr-Orsedd Location in Gwynedd | |
| Location | near Nantlle |
| County | Carnarvonshire (now Gwynedd) |
| Country | Wales, UK |
| Coordinates | 53°3′38″N 4°13′37″W / 53.06056°N 4.22694°W SH 508 538 |
| Production | |
| Products | Slate |
| Type | Quarry |
| History | |
| Closed | 1979 |
| Tramways | |
| History | |
| Opened | 1862 |
| Closed | 1979 |
| Technical | |
| Track gauge | 2 ft (610 mm); 3 ft 6 in (1,067 mm) |
Pen-yr-Orsedd quarry was a slate quarry in the Nantlle Valley in North Wales. It was one of the last slate quarries operating in North Wales and the last operating in the Nantlle Valley area, finally closing in 1979.