The outer fosse, the defensive ditch that once ringed the enclosure, survives only along the northern arc, from the north-west through to the north-east. Everywhere else, it was almost certainly ploughed away when the trackway was laid down, leaving a gap in the archaeological record that you can read directly in the landscape if you know what to look for.

The site is a univallate rath, meaning a ringfort enclosed by a single earthen bank rather than the two or three concentric rings that mark more elaborate examples. Ringforts of this type were the commonplace farmsteads of early medieval Ireland, typically dating from roughly the fifth to the twelfth centuries, used by farming families as much for the management of livestock as for any military purpose. This one measures roughly 31 metres north to south and 33 metres east to west internally, making it a reasonable mid-sized example. The enclosing bank is 6 metres wide and rises between 1.8 and 4 metres on the outer face, with an average height of about 1.8 metres above the enclosed interior. That interior sits at a slightly higher level than the surrounding fields, a detail that suggests the ground within was deliberately raised or that material was scraped inward during construction. Where the fosse does survive to the north, it measures approximately 3.6 metres wide and 0.6 metres deep, a modest but legible remnant of what would once have formed a continuous circuit around the bank. The site was documented in C. Toal's North Kerry Archaeological Survey, published in 1995.