What survives is defined not by a wall or an earthen bank but by a scarp, a low natural-looking edge where the ground drops away, tracing an oval roughly 32 metres north to south and 23 metres east to west. It is the kind of feature that would be easy to walk past without registering as anything other than a slight unevenness in the terrain.

Enclosures of this type are among the most common, and least understood, monuments in the Irish landscape. They may have served as farmsteads, as places of assembly, or as boundaries around earlier ceremonial or funerary sites; without excavation, the function of any individual example is difficult to pin down. What is clear at Killagh More is that the monument is only partially intact. From the south-west around to the north-west, the enclosure has been quarried away, removing a significant arc of what would once have been a complete oval circuit. That quarrying has left the site in a state of poor preservation, the surviving scarp representing the eastern portion of the original boundary, while the rest has been reduced to nothing.