List of quarries served by the Ffestiniog Railway The quarries The quarries

| Name_ | Mineral | Opened | Closed | Years_connected | Notes_ |
|---|---|---|---|---|---|
| Maenofferen | Slate | 1848 | 1999 | 1848–1975 | Became the major owner of quarries connected via inclines at Duffws station, continued to use the stub of the FfR through Blaenau into the mid 1970s. Untopping operations continue in 2007. |
| Nyth-y-Gigfran | Slate | 1840s | 1882 | 1867–1882 | Sometimes known as Glan-y-Pwll quarry. Became part of the Oakeley Quarry |
| Matthews (Rhiwbryfdir) | Slate | 1825 | 1871 | 1842–1871 | Became part of the Oakeley quarry |
| Manod | Slate | c1850 | Present | 1866-1930s | Sometimes known as Bwlch y Slaters and now given the name Cwt y Bugail. Connected to the Festiniog by the Rhiwbach Tramway |
| Moelwyn Slate | Slate | 1826 | c 1900 | 1867–c 1900 | Remote quarry connected to the FfR by a series of seven inclines; worked intermittently and never successfully. |