 The ruined Wrysgan mill with the slate stacking yard beyond | |
| Location | |
|---|---|
  Wrysgan quarry Location in Gwynedd | |
| Location | near Blaenau Ffestiniog |
| County | Gwynedd |
| Country | Wales, UK |
| Coordinates | 52°59′27.96″N 3°58′16.32″W / 52.9911000°N 3.9712000°W grid reference SH6770445603 |
| Production | |
| Products | Slate |
| Type | Quarry |
| History | |
| Opened | 1830s |
| Closed | 1946 |
Wrysgan quarry was a slate quarry near the village of Tanygrisiau, Blaenau Festiniog, North Wales. It was worked intermittently from the 1830s, and was worked continuously from c.1850 until 1946. Wrysgan was an underground slate quarry, which was located on a small inaccessible site, some 1,390 feet (420 m) above sea level, to the west of Cwmorthin.