This is a rath, the most common type of early medieval enclosure in Ireland, typically constructed between roughly the fifth and twelfth centuries as a defended farmstead. The enclosing bank here measures about 24.8 metres across on its north-south axis, with an interior height of around one metre and an exterior height of 1.7 metres. Beyond the bank runs a fosse, which is simply a ditch, here roughly 2.25 metres wide and 0.4 metres deep, curving from the north-west around to the north and continuing from the north-east down to the south-east. Together, bank and fosse would have given both physical and psychological definition to the space within.

The site was recorded and compiled by Denis Power, with notes uploaded in August 2011. By that point, the enclosure had already absorbed a fair amount of incidental damage. A pathway constructed relatively recently to the west had cut through and truncated the fosse on that side, interrupting the continuity of what would once have been a near-complete circuit. Root damage from encroaching vegetation had also taken a toll on the bank itself, and the north-east to south-east arc of the enclosing element had become heavily overgrown with bushes. These are not unusual conditions for a site of this kind in agricultural land, where maintenance of ancient earthworks competes with the practical demands of farming and access.

A visitor approaching on foot will find the western half of the interior relatively open, level, and grassed over, which gives a reasonable sense of the space that would have been enclosed. The eastern half is far denser with vegetation and harder to read on the ground. The fosse is most clearly visible where the overgrowth has not yet fully colonised it, particularly on the northern arc. The site sits in working pasture, so access and conditions will depend on the land and the season. The name Knockpatrick, referring to a hill associated with Saint Patrick, hints at the longer sacred and settled history of this particular patch of south Limerick, though the rath itself is a domestic rather than ecclesiastical monument, a remnant of the ordinary organised life of an early medieval farming household.