Pant Glas is a hamlet on the A487 road in Gwynedd, Wales, in the community of Clynnog. Historically in Caernarfonshire, it is 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 on the closed Carnarvonshire Railway. The …Pant Glas is a hamlet on the A487 road in Gwynedd, Wales, in the community of Clynnog. Historically in Caernarfonshire, it is 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 on the closed Carnarvonshire Railway. The station closed in January 1957. The railway closed in 1964 and has since been replaced with the Lôn Eifion cycle track. Also nearby is the Arfon transmitting station, the tallest structure in Wales.