A sub-rectangular enclosure, about 165m east-west by 124m, upon the summit of Pen-y-Foel; defined by a bank and ditch above steep slopes on the north and east, on the west is a further rampart and ditch, about 48m from the inner line.

(source Os495card; SJ10NE3)

RCAHMW AP94-CS 0492
RCAHMW AP945069/43; 955003/55; 955004/56

J.Wiles 16.10.02