The A497 road is a non-primary road on the Llŷn peninsula in Gwynedd, north-west Wales.
The eastern terminus is a roundabout with the A487 in Porthmadog (52°55′40″N 4°08′00″W / 52.9278°N 4.1334°W). It runs west along the Cambrian Coast to Pwllheli then north to its western terminus at Nefyn (52°56′07″N 4°31′12″W / 52.9354°N 4.5201°W).
Substantial improvements have been made to the A497 between Abererch, a mile or so east of Pwllheli and Llanystumdwy, a mile west of Criccieth. The new stretch of road has vastly improved access, especially for larger vehicles, to the Llŷn peninsula from the south. It is intended by the Welsh Assembly Government to upgrade the road from Porthmadog to Pwllheli to a trunk road within the next few years.
Coordinates: 52°54′35″N 4°19′51″W / 52.9098°N 4.3308°W