The castle consists of an oval earthen mound measuring 11 metres north to south and 8 metres east to west at its summit, rising 2.4 metres above the surrounding landscape. A defensive ditch, or fosse, encircles the mound on three sides; the north, south and west; measuring 3 metres wide and 0.6 metres deep. On the eastern side, the ground falls away sharply for 4 metres to a crescent-shaped flat area that stretches 20 metres north to south and 8 metres east to west.

The location appears to have been carefully chosen to control a fording point across the river below. The steep eastern slope of the motte drops down to a natural terrace that served as the castle’s bailey, sitting approximately 2.5 metres above the stream level. This lower defensive area was positioned precisely where the water could be easily crossed, giving the castle’s occupants command over this important river crossing.

This type of fortification, with its raised mound and lower courtyard, was typical of Norman defensive architecture introduced to Ireland in the 12th century. The strategic placement beside the ford suggests this castle played a role in controlling movement through the valley, likely serving as both a defensive stronghold and an administrative centre for the surrounding territory. Today, visitors can still make out the distinctive earthworks and appreciate the commanding views across the countryside that made this such an effective defensive position.