The shape is slightly unusual: not the neat circle that most people picture when they think of a ringfort, but a D-shaped or subcircular enclosure, roughly 40 metres north to south and 34 metres east to west. It is the kind of earthwork that could easily be read as a natural feature of the landscape, which is partly what makes it worth a second look.

A ringfort, or rath, is an enclosed farmstead of the early medieval period, typically dating from around the sixth to the twelfth century, defined by one or more earthen banks thrown up to protect a household, its animals, and its stores. This one is defined by a single bank that survives in noticeably uneven condition. On the north and north-east, where an outer berm, a flat shelf of ground beyond the main bank, is still visible at around 3.4 metres wide, the bank reaches an external height of 2.2 metres and retains something of its original profile. Elsewhere it has been reduced to little more than a low scarp, just 0.8 metres high. A relict field bank running roughly west-northwest to east-southeast has slightly clipped the southern perimeter at some point, a reminder that the land around it continued to be farmed and reorganised long after the rath itself fell out of use. No original entrance has been identified, which is not uncommon where the earthworks have suffered this degree of erosion and agricultural interference.

The siting is telling. The slight rise gives just enough elevation to read the surrounding valley floor, while the river provides a natural boundary on two sides. Whether that proximity to the Bonet was a convenience, a partial defence, or simply where the ground happened to be suitable, the relationship between the enclosure and the water is one of the more distinctive things about this particular monument.