The earthwork sitting in pasture on a north-facing slope was levelled, according to local information, sometime in the 1950s, and what remains is a partially surviving bank and a shallow external fosse, the defensive ditch that would originally have ringed the enclosure. The interior, which once measured roughly fifty metres across, now spans only about twenty-five and a half metres north to south, the rest lost to agricultural clearance and a trackway that cuts across the north-east corner. The bank that does persist rises only about sixty centimetres above the interior ground level, barely enough to read as deliberate from a distance.

The site can be tracked, in diminishing form, across successive Ordnance Survey maps. On the 1846 six-inch map it appears as a circular enclosure of around fifty metres in diameter, already truncated to the north by a field boundary running east to west. By the 1897 edition, the enclosure has shrunk to roughly forty metres and sits just south of that same boundary, with a trackway cutting into its north-east and eastern edges. The earthwork is a rath, the Irish term for a ringfort, which is a type of enclosed farmstead dating broadly from the early medieval period, typically defined by one or more earthen banks and ditches and used as a defended homestead for a farming family. This particular rath was probably one of three such monuments noted in the Boolacullane townland during the 1840s, recorded at the time under the names Lissnacrath and Lissoughter, with the third described simply as having no name known locally. Whether this is the unnamed one remains uncertain. About ninety metres to the south-south-east stands a separate monument, a standing stone, which suggests the wider landscape around Boolacullane held significance across more than one period of prehistory and early settlement.