The feature is roughly nineteen and a half metres north to south and sixteen metres east to west, defined by a scarp, a short earthen edge or drop, that stands about 0.7 metres high. That modest height is enough to mark the boundary of what was once a deliberate enclosure, the kind of defined circular or oval space that appears across Ireland in considerable numbers and whose original purpose, whether domestic, agricultural, or ceremonial, is often difficult to pin down without excavation.

What makes the site at Carrowcastle quietly interesting is its setting within a small cluster of related features. A rath sits roughly ninety metres to the northwest. A rath is a ringfort, typically a raised circular enclosure defined by an earthen bank and ditch, associated in Ireland primarily with early medieval settlement and farming, broadly from the fifth to the twelfth centuries. A second enclosure lies just forty-five metres to the northwest. Three earthwork features within such a short distance of one another suggests this was once a more active landscape than the present pasture implies. The interior of the enclosure itself slopes downward from centre to east by as much as one to one and a half metres, following the natural fall of the ground toward an area of wet land to the east. Parts of the scarp at the north and southeast have been quarried away at some point, and a north to south field fence now clips the western edge, with a remnant of an older perpendicular field wall running through the southern half of the interior. Blackthorn scrub is advancing from the hedgerow on the west side, gradually reclaiming the margins of whatever this place once was.