Pant Glas (grid reference SH471473) (Welsh for Blue Hollow) is a hamlet on the A487 road in Gwynedd, Wales, located approximately 10 miles south of Caernarfon, 9 miles north-west of Porthmadog, and 10 miles north-east of Pwllheli. Nearby is the former Pant Glas railway station, which was closed as well as the Carnarvonshire Railway in 1964. The railway has since been replaced with the Lôn Eifion cycle track. Also nearby is the Arfon transmitting station, the tallest structure in Wales.
Welsh opera singer Bryn Terfel was raised at Fferm Nant Cyll Ucha, located just outside the hamlet.[1]
In February 2005, the speed limit for the A487 in Pant Glas was reduced from 50 to 40 MPH.[2]