4 - Eyri (Snowdonia) National Park - Views
Cilgwyn Quarries
A view from Mynydd y Cilgwyn over the Nantlle Valley and Llyn Nantlle Uchaf. Snowdon to the left of the
Northern mountains of the Nantlle Ridge - Y Garn (633m), Mynydd Drws-y-Coed (695m), Trum y Ddysgl (709m),
Mynydd Tal-y-Mignedd with an Obelisk (653m).
Some 50 small Quarries operated in the Valleys. Cilgwyn is where slate quarrying in North Wales may have started.
Slates from this area have been found at the Roman fort in Caernarfon.
Ref: NW 4641
Date: 12/07/2025
Location: SH 4982 5428
