What survives is barely enough to read: a partial arc of stone-faced bank curving from north-northwest through east to south, enclosing a roughly circular space approximately thirty metres across. Beyond that arc, nothing. No visible earthwork, no upstanding masonry, no obvious sign to a passing eye that this particular patch of ridge-top grassland was ever anything other than a field.

Ringforts, known in Irish as raths when built from earthen banks or cashels when constructed in stone, were the standard enclosed farmstead of early medieval Ireland, typically dating from roughly the fifth to the twelfth centuries. Thousands survive across the country in varying states of preservation. The Pollynoon example is at the poorer end of that spectrum. The stone-faced bank that does remain suggests it belonged to the cashel tradition, its outer face once built up with laid stone, though only the section running through the eastern half of the circuit is now legible. To the west, a later field boundary has cut directly across where the ringfort's perimeter would have run, absorbing or destroying whatever remained there. The bog visible to the northeast and south adds a certain context: ridge-top sites like this were often chosen precisely because they sat above the wetter, less workable ground below, offering a dry platform for a farmstead with a clear view over the surrounding terrain.