This stone is just 3 paces south of the track and so has suffered the indignity of lots of modern inials being carved into its surface. GPS reading SH 6924 7100.
There are incisions up to 20cm long, 3mm wide and 2mm deep. Lichen on the east side may be hiding more.
The Gwynedd Archaeological Trust list the stone as coming from the medieval period but to me it seems to have similar character to the Llanfairfechan Arrow Stones just across the county boundary in Conwy which are classified as prehistoric.