From "Herefordshire Register of Countryside Treasures" (1981 H&WCC):
"Iron-age hill fort with a single rampart and ditch well defined at the N end, but rest badly eroded.
Steep hillside used as defence along most of north and south sides. Area is about 24 acres (9.6ha) which represented large hill fort. Name of hill (in Welsh) is probably derived from name of this site, meaning great fort, or hill."