A small, sub-rectangular, univallate enclosure stands at about 274 m above O.D. on the fairly steep south east facing slope of a hill between Estyn Brook and Hirnant, 3 km west of Newbridge-on-Wye. The site which is under pasture at present has been severely
damaged by ploughing so that only its general character is apparent now. A reliable assessment of the original shape and dimensions of the interior is not possible but overall it measures 59 m north to south by 50.5 m.

Source: An Inventory of the Ancient Monuments in Brecknock, Part ii (RCAHMW, 1986, p45)