The earthen bank that once defined this roughly circular fort has been folded into an ordinary field boundary, complete with hedge, and only a low scarp to the north, barely half a metre high, hints that something more deliberate once shaped this ground. There is no visible fosse, the defensive ditch that typically rings such earthworks, and no discernible entrance, which gives the whole site an oddly sealed quality, as though it closed in on itself long ago.

The enclosure measures roughly 29 metres on its longer north-west to south-east axis and 24.5 metres across, placing it comfortably within the range of a ringfort, the type of roughly circular enclosed settlement that was built across Ireland in large numbers during the early medieval period, broadly between the fifth and twelfth centuries. These were typically farmsteads rather than military strongholds, despite the name, and their banks and ditches marked territory and provided a degree of security for livestock as much as people. What makes Rausker slightly more intriguing than its modest appearance suggests is a pair of depressions just inside the north-western perimeter. One runs roughly north to south, the other crosses it at the southern end running east to west, and together they form an L-shaped hollow in the ground. The dimensions are consistent with a collapsed souterrain, an underground stone-lined passage or chamber that was commonly dug beneath or beside ringforts, used variously for storage and refuge. No stone is visible at the surface, which is why any identification remains tentative rather than certain, but the shape and depth of those depressions are difficult to explain away.