Levelled, most likely by agricultural activity at some point in the intervening decades, it left behind only its outline on a map drawn in 1838 and the faint question of what it actually was.

The Ordnance Survey's first edition six-inch map, produced in the 1830s, recorded the feature as a circular enclosure. A trackway running roughly northwest to southeast clipped through it at two points, suggesting the enclosure was already an old thing by the time the surveyors arrived, its shape absorbed into the working landscape. Whether it was a rath, a type of earthen ringfort used as a farmstead enclosure during the early medieval period, or a ring-barrow, a circular earthwork typically associated with prehistoric burial, remains uncertain. Two comparable features survive nearby: a possible rath around 640 metres to the northwest, and what may be a ring-barrow at a similar distance to the east. The proximity of those two sites hints at a small cluster of related activity in this part of County Galway, though without excavation or survey data, any interpretation of the Ballynamuddagh enclosure remains speculative.

Nothing is visible on the ground today. The enclosure exists now only as a cartographic ghost, a circle inked onto an early nineteenth-century map that recorded a feature already ancient then, and since erased entirely from the field it once occupied.