Roughly circular, measuring about 51.7 metres east to west and 50 metres north to south, it sits in open pasture where the grass softens the outlines of an earthwork that was once a working enclosure. What makes it worth a second look is the detail still legible in the ground: the inner face of the bank stands to around 1.55 metres, the outer to 1.45 metres, and the surrounding ditch, or fosse, drops to just over a metre in depth. Along one stretch to the south-east, the bank has stone facing at its base, a practical touch that hints at the effort invested in this place by whoever built it.

Ringforts, known in Irish as raths, are among the most common early medieval monument types in the Irish landscape, typically dating from roughly the fifth to the twelfth century. They functioned as enclosed farmsteads, the bank and fosse providing a modest but meaningful barrier against livestock straying and opportunistic raiding. At Gortnascregga, two breaks in the bank survive: one to the south-south-east, measuring about 1.2 metres wide, with a faint causeway trace still visible across the fosse, and a second to the east at around a metre wide. These were the entrances, the points through which daily life passed in and out. The bank adjacent to the south-south-east entrance has stone facing, suggesting particular attention was paid to this main approach. At some later point, field clearance stones were dumped into the fosse on the eastern side, a mundane act of tidying that has left its own archaeological trace. Inside, faint cultivation ridges run on a north-west to south-east axis, evidence that the enclosed ground was turned over to agriculture at some stage after the fort's original use had ended.