This raised rectangular platform, measuring roughly 30 metres northeast to southwest and 25 metres northwest to southeast, rises dramatically from the low-lying ground with steep scarps reaching heights of 2 to 3 metres. A deep fosse, or defensive ditch, surrounds the structure; its base spans 2 metres whilst the top stretches to over 6 metres wide. What appears to be the original entrance can be traced at the southeast corner, where remnants of a 3-metre-wide ramp cross the fosse. The 1837 Ordnance Survey map marked this site simply as ‘Fort’, with an eel weir noted directly opposite on the river.

The monument may have served as one of the strongholds of the Clann Murchadha branch of the O’Ferral family, who held sway over southern Longford during the medieval period. Intriguingly, another castle site exists in the neighbouring townland of Pallas More, suggesting this earlier fortification might have been abandoned when the newer castle was constructed. Archaeological investigations have revealed the remains of what could be a levelled castle within the earthwork’s interior. The northern and western walls of this structure are still evident; the northern wall extends approximately 13 metres east to west, built from mortared rubble with a thickness of 1.8 metres, whilst sections of its external face remain visible at a height of 0.6 metres.

Unfortunately, modern interventions have taken their toll on the monument. River drainage works by the Office of Public Works destroyed the northern sector, leaving a massive spoil heap in its wake, whilst quarrying activities have damaged the northwestern portion. Aerial photographs from the SMR file show an extensive network of small rectangular fields about 180 metres to the southeast, though these have since been levelled through agricultural improvements. The site bears striking similarities to other ringwork castles in the region, representing an important piece of Longford’s Norman and Gaelic heritage along this strategic river crossing.