This well-preserved earthwork surrounds the remains of Cloonigny Castle, forming an impressive rectangular enclosure that measures approximately 65 metres from north to south and 63 metres from east to west. The site consists of two earthen banks with a water-filled ditch, or fosse, running between them; a classic defensive arrangement that would have made the castle considerably more difficult to attack.

The monument’s defensive features remain most intact along its western and northern sides, where the inner bank still stands prominently. Unfortunately, quarrying activities have damaged portions of the enclosure, particularly from the south to west and from north to north-northeast sections. Despite this disturbance, the site retains several intriguing features including a mound at the southwest corner, complete with its own scarp and external fosse, and an additional ditch that runs along the western edge of the monument.

Today, Cloonigny moated site is protected as National Monument 563 under Irish law, having been taken into state ownership to ensure its preservation for future generations. A modern drainage system now encircles the monument from west through north to east, helping to manage water levels and protect the archaeological remains. The site was documented in detail in the Archaeological Inventory of County Galway, which provides valuable insights into this fascinating piece of Irish medieval heritage.