The site is a rath, the Irish term for a ringfort, a type of enclosed settlement that served as a farmstead and homestead for a family of some local standing during the early medieval period, roughly between the fifth and twelfth centuries. Thousands of them survive across Ireland, but this one at Tigroney retains a particularly legible arrangement of earthworks, making it possible to read the logic of the original enclosure with some care.

The enclosed area is roughly oval, measuring around 47 metres on its longer axis, and it is defined by an earthen bank that survives to an external height of up to 2.4 metres in places. Around the eastern, southern, and northern arc of the enclosure there is an outer fosse, a defensive ditch, approximately three metres wide and up to half a metre deep, with a slight counterscarp bank, a low secondary ridge on the outer edge of the ditch, surviving at the south-east. Where the bank is lower or less pronounced, natural scarps in the slope appear to have been incorporated into the overall boundary, reducing the labour needed to complete the circuit. The original entrance seems to have been at the south-west, where a three-metre gap in the bank is accompanied by a ramp rising from the base of the fosse. Immediately to the south-south-east, a small circular feature about fifteen metres in diameter is attached to the main enclosure and may represent an annexe, possibly used for livestock or storage, a common arrangement at sites of this type.

The fort sits on a gentle south-east-facing slope, with steeper ground dropping away toward a stream to the south-east. That positioning is typical of rath siting across Ireland: sheltered, with good drainage, and close enough to water without sitting in the flood-prone low ground. The relationship between the earthwork and the stream below gives the site a sense of deliberate placement that rewards a slow walk around its perimeter.