Open pit.

The narrow pit is encircled by extensive waste tips, separated from the 1904 slate mill by a road cutting. The mill itself, though truncated, survives largely intact and stands as the only roofed slate mill remaining in the area, making it a structure of particular significance. Within the pit, a length of wire rope still clings to a broken timber, marking where the cableway system once operated. To the west lies a small red-slate quarry, now abandoned, while in the field below this working a partially infilled exploratory trial.

Fron Quarry began as an 18th-century pit working, entirely distinct from the later and far more substantial Braich quarry nearby. In its earliest phase, pumping operations relied on wind power, but this system was destroyed during a storm in 1827. Following this setback, the quarry adopted steam power for both pumping and haulage, modernising its infrastructure considerably. In later years, the quarry made use of the NWNGR Fron branch to transport slate to Drumhead. Operations ceased in the early 20th century.