Growing along the line of an ancient fosse, a shallow defensive ditch that once encircled a farmstead, they mark out the perimeter of a ringfort in Cooltomin, County Limerick, with more botanical honesty than any signpost could manage. Ringforts, known in Irish as raths when formed from earthworks, were the standard unit of rural settlement in early medieval Ireland, typically enclosing a single family's dwelling and outbuildings within a circular bank and ditch. Most of the landscape once held them; many have since been ploughed away or built over, which makes even a modest surviving example worth pausing over.

This particular rath sits on low-lying, flat pasture, a setting that might seem unremarkable but is itself informative, since ringforts were not always placed for defensive advantage and often simply marked out the territory of a farming household. The enclosure is nearly circular, measuring 30.5 metres north to south and 30 metres east to west. The earthen bank survives to an internal height of around 0.55 metres and an external height of 1.1 metres, and retains patches of stone facing, the dressed or laid stonework that originally reinforced the bank's exterior. This facing is best preserved along the south-southeast to southwest arc and again from northwest to north. A short length of facing, approximately 1.6 metres, also survives near the base of the inner bank face on the east-southeast side. The external fosse, now shallow at roughly 0.2 metres deep and 1.3 metres wide, runs from north-northwest to south-southeast. The site was recorded by Denis Power and uploaded to the national record in August 2011.

The interior is level and covered by mature deciduous trees, with loose stones scattered across the ground beneath them, likely the dispersed remnants of whatever structures once stood inside. The treeline makes the enclosure visible from a distance even when the low bank itself might be easy to miss at ground level. The fosse, though much reduced, is most legible in spring or early summer when the nettles marking its line are at full growth. The site sits within working pasture, so access depends on the landowner's goodwill and the usual courtesies of approaching farmland. There is no formal path or interpretation, and the surrounding landscape offers little by way of orientation, so a detailed map or GPS reading is worth having before you set out.