What remains is a subcircular rath, a type of enclosed farmstead typically dating from the first millennium AD, measuring roughly 41 metres east to west and 38 metres north to south. A rath is essentially a ringfort defined by earthen banks and a fosse, the ditch dug between them, and was once the standard unit of rural life across early medieval Ireland. Thousands were built; many were later ploughed out, built over, or simply left to erode.

At Lissaniska, the erosion has been considerable. The inner bank can still be traced around most of the circuit, though to the south it gives way to a scarp, a natural or modified slope that takes over the work of enclosure where the bank has vanished. The fosse and outer bank have fared worse, surviving only along the arc from west-southwest to northwest. The interior has been extensively ploughed, which will have disturbed whatever archaeological deposits once lay within. What is left is a partial silhouette of a structure that once would have enclosed a household, its outbuildings, and perhaps its animals within a clearly defined boundary.

The site sits in grassland and is visible from the farmhouse it neighbours, though its worn condition means it reads more easily on a map or aerial photograph than underfoot. Visitors with an eye for slight changes in ground level may pick out the surviving bank and the faint depression of the fosse along the western arc, but much of what made this place legible as a settled landscape has been quietly lost to centuries of agriculture.