It is, in fact, a rath, the remains of an enclosed farmstead that would have been home to an early medieval Irish family, most likely between roughly the fifth and twelfth centuries. Thousands of these ringforts survive across Ireland, yet each one represents a specific act of settlement, a decision by someone to enclose a particular patch of ground and call it theirs.

The earthwork at Graigueadrisly is modest but measurable. The enclosed area spans approximately 28.5 metres in diameter, defined by an earthen bank around 2.3 metres wide. On the interior, that bank stands roughly 0.8 metres above the enclosed ground; on the exterior, it rises to about 1.5 metres, giving a modest but deliberate sense of elevation and boundary. There is a gap in the bank at the south-east, which likely marks the original entrance. Outside the bank, traces of a fosse, that is a ditch dug to provide the material for the bank and to reinforce the enclosure's defensive or symbolic boundary, are still faintly visible. The combination of bank and fosse was the standard formula for a rath, distinguishing it from a cashel, which used stone rather than earth. What stood inside, whether a timber roundhouse, outbuildings, or a small yard, has long since vanished.