It is the surviving bank of an early medieval ringfort, so thoroughly absorbed into the working landscape that the two are now functionally inseparable. This is not unusual for Ireland, where several thousand ringforts, or raths, survive in varying states, but it does mean that what was once a self-contained enclosed settlement has had its outline quietly borrowed by later farmers drawing their land divisions.

A rath was typically a circular earthen bank, sometimes accompanied by a ditch, enclosing a farmstead and offering a degree of protection for people, livestock, and stores. The example at Kilgarriff, sitting roughly 530 metres west of the Ahnaguarra Stream in County Limerick, appears on the Ordnance Survey six-inch map of 1840 as a straightforward circular enclosure. By the time the more detailed 25-inch map was produced in 1897, the picture had become more complicated: the monument is shown as a roughly circular area of approximately 25 metres in diameter, with its bank surviving from the north-west around through east to the south-west, but incorporated into a field boundary for the remainder of its circuit. A well is marked 30 metres to the north of the feature, a detail worth noting given that wells were frequently associated with early settlement sites. A second enclosure, recorded separately, lies about 210 metres to the south. The site was compiled by Martin Fitzpatrick and uploaded to the record in November 2021.

The monument is in pasture and is not formally developed for visitors. The clearest view of its outline comes not from the ground but from above: satellite imagery, including Digital Globe orthoimages taken between 2011 and 2013, shows the circular form defined by the treeline that has grown along its edges. On the ground, the bank section that has not been folded into the field boundary is the most legible part of the structure, though it requires a careful eye to distinguish ancient earthwork from routine agricultural boundary. The associated well to the north is worth looking for if access allows.