Most ringforts, the enclosed farmsteads of early medieval Ireland typically bounded by an earthen bank and ditch, present a more or less continuous ring. This one is different. What survives above ground is a C-shaped arc of bank roughly thirty metres in diameter, with the circle completed to the north-west not by a built bank but by a natural scarp in the hillside. Whoever settled here in the early medieval period appears to have made deliberate use of the existing topography, letting the land itself do part of the work.

The site sits in pasture on a natural terrace, and its shape has been recorded consistently across all editions of the Ordnance Survey six-inch maps, the first of which dates to 1842. That early map is the most informative, showing the scarp clearly as the functional substitute for the missing arc of bank. Over time the earthworks have become completely overgrown and are now inaccessible, which means the cartographic record carries much of the interpretive weight. The place-name Rathcobane contains the Irish word rath, the standard term for a ringfort of this type, suggesting the site was significant enough to anchor local naming long after its original use had ended.