It is easy to mistake for a natural rise in the ground, especially since the bank has long been pressed into service as a field boundary. That double life, part ancient monument, part working farm infrastructure, is exactly what makes so many Irish ringforts easy to miss.

A rath, the Irish term for this type of ringfort, is an enclosed farmstead of the early medieval period, typically defined by one or more earthen banks and ditches that once marked out a family's dwelling space. The Ballynaglogh example is roughly circular, measuring about 32 metres north to south and 27 metres east to west. Its defining bank stands around 1.2 metres high, though it is now in poor condition, and from the southern to south-western arc there is a slight inward incline that suggests the presence of a fosse, the ditch that would originally have accompanied the bank on its outer side. A possible original entrance, about 2.5 metres wide, survives on the northern side, though the perimeter has since been broken by numerous cattle gaps in a way that tells its own story about centuries of agricultural reuse. The interior of the enclosure slopes down towards the east, and the whole site looks out over a tributary of the Glashanabracka river from an east-facing hillside position that would have offered both drainage and a reasonable outlook over the surrounding land.