Though no castle masonry remains visible above ground, the site still hints at its past; loose limestone rocks scatter across certain areas, whilst more stones lie hidden beneath the surface sod, particularly in the central and southern sections of the mound. The location appears on historical Ordnance Survey maps, first marked as ‘Site of Black Castle’ on the 1840 edition, where it was depicted as a ruined building oriented northwest to southeast, measuring approximately 11 metres by 9 metres.

By the time of the 1906 Ordnance Survey six-inch map, cartographers had noted additional details about the site, showing the castle remains sitting within an earthwork platform. This platform, catalogued as TS069-057002, represents the defensive earthworks that would have once surrounded and elevated the castle structure, a common feature of medieval fortifications in Ireland.

Today, visitors to Blackcastle will find little of the imposing structure that once stood here, yet the mound itself serves as a tangible link to Ireland’s medieval past. The subtle undulations in the landscape and the occasional limestone fragment breaking through the grass are all that remain of what local memory and old maps tell us was once the Black Castle, its name preserved in both the townland and the historical record.