No earthwork breaks the surface, no bank or ditch catches the eye; the site exists now only in the language of old maps and placename records, a circular enclosure that has effectively disappeared into the ground it once organised.

A rath, to give it its Irish archaeological term, is a roughly circular enclosure defined by one or more earthen banks, built during the early medieval period and used as a farmstead or place of habitation. This one in Laharan was captured on the Ordnance Survey six-inch map of 1846 as a circular enclosure with a diameter of approximately twenty metres, a modest but legible feature in the landscape. By the time the revised six-inch map was produced in 1895, something had changed: the same feature was recorded as a smaller, irregular enclosure, roughly ten metres by ten metres, suggesting the earthwork had already begun to erode or be disturbed in the intervening decades. The site is almost certainly the place recorded in the 1840s Ordnance Survey Name Books for the parish of Kilbonane as 'Lissnamucka' fort, noted then as lying in the centre of Laharan townland. The name itself is telling: lios, the Irish word for a ringfort enclosure, combined with na muc, meaning "of the pigs", suggesting the site had long since passed from any remembered defensive or domestic function into everyday agricultural use, its identity preserved mainly in what people called the field.