From the air, the outline of a circular enclosure appears as a cropmark, a phenomenon that occurs when buried ditches or banks affect the moisture available to plants above them, causing them to grow at slightly different rates and colours than the surrounding field. The result, invisible at ground level, is a ghostly circle that surfaces only in aerial photographs under the right conditions.

The enclosure has an internal diameter of approximately 55 metres, making it a reasonably substantial example of a rath, the Irish term for a ringfort of earthen construction typically dating to the early medieval period, broadly between the fifth and twelfth centuries. These were the farmsteads of their age, enclosed by one or more banks and ditches, used for settlement and the protection of livestock. Here the single fosse, the surrounding ditch, is roughly four metres wide, and there is a gap in its circuit at the north-west that marks the original entrance. The level ground on which it sits, unremarkable in itself, was presumably chosen for agricultural convenience, as ringforts are often found on land that was workable rather than dramatically positioned.