The monument sits on poor, low-lying ground in County Limerick, which is itself worth noting; most people assume these early medieval enclosures occupy commanding hilltop positions, but a good number of them occupy exactly the kind of damp, unremarkable farmland that agricultural improvement later swept away. The fact that this one survives at all, even in reduced form, is largely down to the accident of its setting.

When the archaeologist O'Kelly recorded the site in 1942 to 1943, the essential form was still legible. A circular platform, edged by the remnants of a bank, was surrounded by a fosse, which is the term used for the ditch dug out to provide material for the bank itself. The entrance on the north-west side retained a clear causeway crossing the fosse, the bank on either side of the gap still standing to a maximum of about one and a half metres above the fosse bottom. The overall diameter measured around forty-one metres, which is a fairly typical scale for a rath, the Irish word for a ringfort and the type of enclosed farmstead that was the standard unit of rural settlement across Ireland from roughly the early centuries of the first millennium into the early medieval period. Thousands were built; several thousand survive in some form. This one in Castlefarm is among the less celebrated.

The site does not announce itself at ground level, and the eroded bank and silted fosse are easy to miss without some prior knowledge of what to look for. Aerial photography has proven more revealing than a visit on foot; the outline of the monument was clearly identifiable on Digital Globe aerial photographs, and an Archaeological Survey of Ireland photograph taken in January 2003, reference ASIAP 352/5, shows the form from above with useful clarity. Anyone approaching the site should expect flat, potentially wet ground and a monument that rewards patience and a certain willingness to read landscape rather than encounter an upstanding ruin. The causeway approach on the north-west is the most coherent surviving feature, and orienting yourself to that entrance point gives the clearest sense of how the enclosure was originally organised.