The rath at Gardenfield, County Limerick, survives with enough of its original geometry intact to make clear what Early Medieval farmers were actually building when they enclosed a patch of ground with a circular earthen bank. A rath, essentially a ringfort defined by earthen rather than stone construction, was the standard farmstead type across Ireland roughly between the fifth and twelfth centuries. This one sits in pasture on a gentle west-facing slope, its interior dry and free of overgrowth, which is not always the case with sites left to graze rather than excavate.

The enclosure is nearly circular, measuring 27.9 metres north to south and 28.4 metres east to west, dimensions that place it in the middle range of Irish ringfort sizes. The earthen bank that defines it stands 0.85 metres above the interior ground level and rises 1.6 metres on the outer face, where an external fosse, a drainage ditch dug to reinforce the bank and discourage casual entry, runs along the north-north-west to north-north-east arc and again from the east-north-east round to the south-south-east. The fosse here is modest, 0.45 metres deep and 2.65 metres wide, but its presence is consistent with a deliberately constructed perimeter rather than a casual field boundary. Three gaps interrupt the bank: one to the west-north-west at 3.2 metres wide, one to the east at 1.2 metres, and a broader opening to the south-south-west at 5 metres, the last of which is the most likely candidate for the original entrance. The site was recorded by Denis Power and uploaded to the national record in August 2011.

The rath sits in agricultural land, so access will depend on the goodwill of whoever works the field. The interior slopes downward toward the west, which becomes apparent once you are standing inside the bank; it gives the whole enclosure a slightly tilted quality that photographs rarely convey. The bank is clearest on the eastern side, where the fosse is also most legible as a distinct feature rather than a vague depression. Visiting in late winter or early spring, before grass growth obscures the earthwork's profile, gives the best sense of its shape from ground level.