It is modest in scale, roughly twenty-one metres across, and its defining feature is a low bank of earth and stone, in places still reinforced by a boulder revetment, the kind of rough stone facing used to hold an earthwork in shape against the slow pressure of weather and time. The bank ranges between two and five metres wide and rises no more than about a metre at its highest point. A single gap on the northern side, just a metre wide, marks what was once the entrance.

This is a rath, the most common type of early medieval settlement monument in Ireland. Raths were typically the enclosed farmsteads of farming families, their circular banks providing a degree of security for livestock as much as for people. Thousands survive across the country, though many have been damaged or levelled by centuries of agriculture. The Annacrivey example is notably plain even by the usual standards of the type: there is no fosse, the outer ditch that often runs alongside the bank of a ringfort, and no visible trace of any internal structures. Whether that reflects the original simplicity of the enclosure, or simply the degree to which time has softened its features, is difficult to say without excavation.