The earthwork stands prominently to the left (north) of the A525 Ruthin-Wrexham road, soon after this passes through the wooded Nant-y-Garth pass. On private land: access on foot via the field reached by turning sharp left soon after the earthwork and continuing up lane. Permission must be obtained at the farmhouse.
Among he finest medieval earthwork castles in Wales, Tomen-y-Rhodwydd was raised by Owain Gwynedd during his conquest of northern Powys in 1149. It occupies a strategic site, controlling the approach to nearby Nant-y-Garth pass through the Clwydian Hills. The earthen ‘motte’ or mound would originally have been topped by a timber tower and the encircling enclosure by a wooden stockade. It was later occupied by King John of England during his campaign against Llywelyn the Great in 1212.
Aerial view, Tomen y Rhodwydd