What you find here is an oval enclosure, roughly 23 metres north to south and just over 25 metres east to west, sitting on a gentle south-east-facing slope in rough, undulating pasture. The earthwork is not immediately dramatic, but measure it properly and the bank still stands nearly three metres high on the outside. That kind of scale, quietly persisting in a working field, is the thing that makes these places worth slowing down for.

Ringforts, known in Irish as raths when their banks are earthen rather than stone, were the standard settlement form of early medieval Ireland, used roughly between the fifth and twelfth centuries as enclosed farmsteads for a single family and their livestock. The Ballyallinan example was recorded by Denis Power and uploaded to the national monuments record in August 2011. The bank is composed of earth and stone and is best preserved along the northern to south-western arc. Along the eastern side, the top of the bank widens to about two and a half metres and retains traces of an internal stone revetment, a facing of upright or laid stone used to hold an earthen bank in shape, standing around 45 centimetres high at the north-east. An external fosse, which is simply a ditch dug to provide the material for the bank and to add a further obstacle to any would-be intruder, runs from the north-west around to the south-south-east. It is reasonably legible on the north-western to north-eastern stretch but becomes almost imperceptible further east. There is a clear entrance break in the bank on the west-north-west side, about six metres wide, which is where the original gap for entry would have been. Parts of the southern bank have been absorbed into the modern field boundary system, a fate that has befallen countless monuments of this kind.

The site sits in rough pasture rather than maintained ground, so the interior is uneven underfoot and scattered with loose stones. Visitors should expect no signage or formal access path. The monument falls within an agricultural landscape, so anyone approaching should do so with awareness of the land and its use. The structure is most legible in low winter light or after rain, when the relief of the bank and the shallow line of the fosse become easier to read from a short distance away.