Mynydd-y-Fforest is a sub-circular enclosure, c.60m in diameter, set on a south-facing slope and defined by a bank and ditch, counterscarped on the north and north-east.

A rectangular enclosure lies immediately to the north-east (Nprn305434).

(source Os495card; ST07NW5)
RCAHMW AP955149/49-52
J.Wiles 29.01.03