What remains is a subcircular rath, roughly 34 metres east to west and 29 metres north to south, its boundary now reduced to a degraded scarp and the faint trace of an external fosse. A rath is an enclosed farmstead of the early medieval period, typically defined by one or more earthen banks and ditches, and at its height this one would have sheltered a household, its animals, and its stores within a clearly marked boundary. Today, the scarp, a sloped earthen edge where a more pronounced bank once stood, and the fosse, a surrounding ditch, are all that signal there was ever anything deliberate here at all.

Raths of this kind are among the most common archaeological monument types in Ireland, with tens of thousands recorded across the country, yet each one represents a specific choice: a family or small community selecting a particular piece of ground, raising an enclosure, and living within it, most likely between the sixth and twelfth centuries. The hillock setting at Caltra would have offered modest advantages, a slightly elevated position above wetter ground, better drainage, a clearer view of the surrounding land. The modest dimensions suggest this was not a high-status site; larger multivallate raths, those with multiple concentric banks, tend to be associated with wealthier or more powerful occupants. This one reads as the remains of an ordinary rural life, its outlines worn almost smooth by centuries of grazing and weather.