It is the kind of site that rewards patience rather than spectacle: a low bank of earth and stone, no more than half a metre high on its inner face, tracing a rough circle roughly fifty metres across. Around its outer edge runs a fosse, the shallow ditch that would originally have accompanied the bank as part of a unified boundary, though today only the western to northern arc of that ditch remains legible in the landscape. Trees have colonised both the bank and the interior, and the whole thing sits in dense woodland that makes reading the ground difficult.

Enclosures of this general type are among the most common archaeological features in the Irish countryside. Many are thought to be early medieval in origin, functioning as enclosed farmsteads or settlement areas, sometimes called raths or ringforts depending on their construction. The defining features are typically a raised internal area, a surrounding bank, and a fosse on the outside. At Rosturra, the bank survives at between sixty and eighty centimetres wide, modest dimensions that suggest either significant erosion over time or a structure that was never especially imposing to begin with. The partial survival of the fosse only on the western to northern arc points to centuries of agricultural disturbance or tree growth having gradually obscured the rest. The site was recorded as part of the Galway Archaeological Survey conducted through University College Galway.