The enclosure at Coolsrahra sits in ordinary pastureland, yet its footprint is substantial, running roughly 228 metres east-north-east to west-south-west and about 173 metres north-north-west to south-south-east. What defined a site like this in early medieval Ireland was the combination of a raised inner bank, an outer bank, and a fosse between them, essentially a wide ditch dug to separate the sacred interior from the secular world beyond. Here, both banks and the intervening fosse survive across much of the circuit, though the inner bank fades to almost nothing along its western arc, visible only as the faintest trace at ground level.

At roughly the centre of the enclosed space stands an early medieval church, the kind of modest stone structure that once anchored small religious communities across the Irish landscape. Writing in 1912, Redington noted that an even earlier church may have preceded it, which would push the site's religious significance back further still, possibly into the first centuries of Irish Christianity. An east-west running bank within the south-west quadrant of the interior may represent an internal division of the kind commonly found in ecclesiastical enclosures, separating different functional areas such as a burial ground, a garden, or a monastic precinct. McCaffrey, writing in 1952, also documented the site, suggesting it attracted at least some scholarly attention in the mid-twentieth century, even if it has received little since.