It is not dramatic to look at, but the geometry is deliberate and the engineering is real: an earthen bank rising to about 1.2 metres, a scarp on the opposite arc, and an external fosse, or ditch, cut to roughly 0.7 metres deep. Together they describe a defended enclosure roughly 36 metres from north to south and 28 metres east to west, oval rather than the more idealised circle its name might suggest.

This is a rath, the most common type of ringfort found across Ireland, typically dating to the early medieval period, between roughly the sixth and tenth centuries. A rath was built from earth rather than stone, the bank thrown up from the spoil of the surrounding ditch, and it served primarily as a farmstead enclosure, protecting livestock and a family's dwelling from wolves and neighbours alike. What makes the Burrane example quietly interesting is the possible souterrain noted to its north-north-west. A souterrain is an underground passage or chamber, usually stone-lined, built beneath or adjacent to a ringfort; they were used for storage, as refuges, or possibly both. The Burrane souterrain has its own separate record, suggesting it has at least been identified as a distinct feature, though whether it connects directly to the enclosure above remains uncertain.