It sits on a slight prominence in otherwise flat, low-lying farmland, and the only thing that distinguishes it from the surrounding ground is a gentle earthen scarp, between half a metre and just under a metre high, tracing out a rough oval shape roughly 35 metres across on its longer axis and 25 metres on the shorter. There is no visible ditch, or fosse, encircling it, which would normally help define a site of this kind, and whatever entrance once allowed people in and out has long since been erased.

Enclosures of this type are broadly understood as ringforts, the most common field monument surviving in the Irish landscape. They served as enclosed farmsteads during the early medieval period, roughly from the fifth to the twelfth centuries, with the surrounding bank or scarp providing a degree of shelter and security for a family and their livestock. At Lisnacreevy, the interior has been bisected by a later field boundary running northwest to southeast, dividing what would once have been a single enclosed space into two roughly equal portions. More damaging still, the southeastern arc of the scarp has been cut away during the construction of another field boundary and an accompanying drain, taking a section of the monument with it. In the northeastern quadrant, there are traces that may indicate the remains of a house structure, though its precise character remains uncertain.