There is no visible entrance anywhere along its perimeter, which for a site of this kind is genuinely odd. Ringforts, the enclosed farmsteads of early medieval Ireland typically defined by earthen banks and ditches, almost always preserve some trace of a formal gap or causeway where a household would have passed in and out. Here, on a north-facing slope of a low ridge at Lissian in County Roscommon, that threshold has either been entirely erased or was never made obvious to begin with.

The site sits on a gentle spur and measures roughly 47 metres across. Its structure is more elaborate than a simple single-banked enclosure. Working outward from the interior, there is a grass-covered inner earthen bank, then a fosse (a defensive ditch), then an outer bank that has been absorbed into a later field boundary, and beyond that a further, shallower outer ditch. Double-banked ringforts of this kind, sometimes called bivallate raths, are generally associated with higher-status households than their single-banked equivalents, suggesting that whoever built and occupied this place held some local significance. The site appears on the 1914 edition of the Ordnance Survey six-inch map, though it is not marked on earlier editions, which says more about the history of cartographic attention than about the age of the earthwork itself. About 350 metres to the east-southeast, along the same ridge, a second rath sits in the same landscape, a reminder that these enclosures often clustered in ways that imply connected communities rather than isolated farmsteads.

One further detail deserves attention. At the northern and eastern edges of the perimeter there are swallow holes, natural sinkholes where water drains into the underlying limestone. Their presence on the boundary of the enclosure is unlikely to be coincidental, though whether they influenced the choice of site or simply developed over centuries of agricultural use is impossible to say without excavation.