This is no modest farmstead enclosure. Known locally as Mullaghaliss Fort, or in Irish Mullach an Leasa, the site belongs to a class of monument called a bivallate rath, meaning it was defended by two concentric banks and ditches rather than the single ring more commonly encountered across Ireland. Raths were the enclosed homesteads of early medieval Ireland, typically dating from roughly the fifth to the twelfth centuries, and the presence of a double enclosure generally signals a household of some standing, one with the labour, resources, or strategic need to construct that extra ring of defence.

The fort measures approximately 32.5 metres across north to south and 37 metres east to west, making it a substantial structure. Its north-eastern arc is the most legible section, where the outer bank, largely composed of loosely piled stone, survives to about a metre in height. From there the ground drops 1.7 metres into a flat-bottomed fosse, the ditch between the two banks, before the inner earthen bank rises again to its maximum of 2.7 metres. A modern field boundary cuts across the site on a north-east to south-west line, bisecting it and complicating any reading of the whole. The interior is heavily overgrown and has yielded no obvious surface features. What makes the location additionally interesting is its company: roughly 300 metres to the south-west, across the Owenroe river, two further raths occupy the opposite bank, one of them a univallate example known as Lisheenhear. The clustering of three enclosures within such a short distance of one another, positioned at the valley mouth, suggests this was once a well-settled and probably well-organised stretch of early medieval landscape.