The personal name embedded in that title is a small puzzle in itself. Ringforts, or raths, are among the most common archaeological features in the Irish landscape, typically dating from the early medieval period, roughly the fifth to twelfth centuries. They were enclosures used for settlement and the protection of livestock, defined by one or more earthen banks and a surrounding ditch called a fosse. What sets Lios Thaidhg apart is not dramatic scale but the persistence of a specific human name attached to it, suggesting some local memory, however fragmentary, of an individual associated with the place.

The fort is a roughly circular, slightly raised area approximately 35 metres in diameter. Its earthen bank stands about 1.2 metres high on the interior side and rises to 1.8 metres on the exterior, with an external fosse some 0.55 metres deep running around most of the circuit. A gap of around 5 metres in the bank to the north-east likely marks the original entrance, and the fosse is absent for a short stretch in that same direction, which is consistent with how entrances to raths were typically arranged. The interior is reported to be heavily overgrown to the south and west. The name Lios Thaidhg was recorded by Bowman in 1934, a reminder that local oral knowledge was still carrying this kind of information well into the twentieth century, even as the earthwork itself continued to weather quietly into the hillside.