At just over twenty metres in diameter, it is a modest example of a form of enclosed settlement that was once common across Ireland, typically serving as a farmstead for a single family and their livestock. What survives here is fragmentary: the outer wall has tumbled, the inner wall is missing entirely along its south-south-east to south-west arc, and the whole thing sits quietly in ordinary farmland, easy to overlook.

The site was recorded by McCaffrey in 1952, catalogued as number 39 in a survey that documented the archaeological landscape of the area. Cashels of this kind generally date to the early medieval period, roughly the sixth to tenth centuries, though some continued in use later. They were built where stone was plentiful and timber less so, and their drystone construction, walls laid without mortar, means they are particularly vulnerable to collapse and robbing over the centuries. The Drumacoo example has fared no better than most, and what remains is essentially a legible ghost of the original enclosure rather than anything that reads clearly as a structure.