The site consists of a roughly rectangular enclosure, measuring about 26 metres from north to south and 23 metres east to west, with characteristically rounded corners. What makes this earthwork particularly interesting is its well-preserved scarped edge, which rises approximately 45 centimetres above the surrounding pasture, accompanied by the faint but discernible traces of an external fosse, or defensive ditch, that runs along the southwestern to northwestern perimeter and measures roughly 2.5 metres in width.

The site has seen better days; dense overgrowth now blankets the entire area, making detailed examination challenging. The northeastern to southeastern section of the scarp has been truncated where an old field boundary once ran through, though this has since been removed. Despite these alterations, the interior of the enclosure appears to remain relatively level, suggesting it may have once supported structures, though no obvious entrance features can be identified through the vegetation.

Such moated sites were common in medieval Ireland, typically dating from the 13th to 14th centuries, and were often associated with Anglo-Norman settlement patterns. They served as defended homesteads for wealthy farmers or minor gentry, with the moat providing both defensive capabilities and a status symbol. The Rossmore example, documented by Denis Power in August 2011, represents one of many such sites scattered across the Irish landscape, each telling its own story of medieval life, land management, and the complex social hierarchies of the period.