The enclosure measures approximately 31 metres from north to south and 26 metres from east to west, with its perimeter defined by a stone wall that’s about a metre wide and half a metre high. The wall construction appears quite basic, with no visible facing stones to indicate more elaborate building techniques, and archaeologists haven’t been able to identify where the original entrance might have been located.

What makes this site particularly interesting is the later addition of a cairn on the western side of the enclosure wall. This stone mound contains a kiln, suggesting the site continued to be used for different purposes long after the castle fell into disuse. The overlying cairn indicates a complex history of occupation and reuse at this location, typical of many Irish archaeological sites where successive generations adapted ancient structures for their own needs.

The castle ruins themselves, whilst not extensively documented, form part of the broader archaeological landscape of County Leitrim. Cherry Island’s strategic position likely made it an attractive location for fortification, though the modest size of the enclosure suggests this was probably a relatively small defensive structure rather than a major stronghold. The site offers a glimpse into the layers of history that characterise Ireland’s medieval landscape, where defensive structures, agricultural features, and industrial elements often overlap in the same location.