This rectangular enclosure measures 38.5 metres east to west and 30 metres north to south, and sits on a platform along the north side of an east-west ridge. The site’s northern and eastern boundaries are marked by substantial double banks that have become overgrown over the centuries, with the outer banks reaching heights of up to 2.9 metres and the inner banks standing at 2.2 metres. Between these earthworks lies a ditch approximately 0.6 metres deep, creating a formidable defensive barrier.

The western side of the site features similar double banks and ditches, though these have become waterlogged over time, whilst the southern boundary shows evidence of a single bank with traces of an accompanying ditch that has been partially levelled. Within the southwestern corner of the enclosure, archaeologists have identified a triangular platform, and the northwestern corner reveals particularly interesting construction details; this section was stone-faced on its interior, with a notable concentration of stones scattered on the ground, suggesting more substantial building work in this area.

The site forms part of a broader medieval landscape, with another moated site located immediately to the west. These earthwork enclosures were typically constructed between the 13th and 14th centuries by Anglo-Norman settlers and wealthier tenant farmers, serving as fortified farmsteads that provided both security and status in medieval Ireland. The preservation of the banks, ditches, and stone features at Slievegallane offers valuable insights into the defensive strategies and building techniques employed during this period of Irish history.