The roughly circular enclosure here, measuring about 31.5 metres north to south and 29 metres east to west, is the kind of site that rewards patience and a certain tolerance for ambiguity. Its earthen bank is poorly preserved, and the southeastern portion has been so thoroughly levelled that it is visible only as a faint crop mark on aerial photography. A ringfort, or rath, was typically a farmstead enclosed by one or more earthen banks and ditches, home to a single family of some modest status during the early medieval period, roughly the fifth to twelfth centuries. Most Irish ringforts share this domestic character, but what makes Loughanstown quietly notable is its immediate company: two further ringforts sit within 200 metres, one to the north-north-west and another to the north-east, with a separate earthwork also nearby to the east. This kind of clustering is not accidental, and suggests that the low, boggy landscape around here was once far more densely settled than it now appears.

The site sits on a slight natural rise in gently undulating pastureland, with bogland beginning around 800 metres to the west and north-west. That positioning on raised ground, however modest the elevation, is entirely typical of ringfort builders, who preferred drier, more defensible spots above the surrounding terrain. The interior of the enclosure slopes gently from south-west to north-east, and faint traces of cultivation ridges running north-east to south-west are still legible within it, suggesting the ground inside was farmed at some point. A field fence, post-dating 1700, was built running onto the perimeter at the south-east, and it is largely this later imposition, combined with general agricultural wear, that has erased so much of the original earthwork. Notably, where the bank has survived best, along the western to northern arc, it has been steepened because it now serves as part of the townland boundary between Loughanstown and Windtown North, a piece of administrative geography effectively preserving the ancient line by accident.