This is a portal tomb, a type of megalithic monument built during the Neolithic period in which large upright stones support an enormous capstone, typically angled to create a distinctive wedge-shaped profile. The Clogher example is a substantial one, spanning roughly five metres along its northwest to southeast axis, but it has slipped considerably from whatever arrangement its builders intended, and the opening that once faced northwest has largely fallen in.

The tomb sits on a raised knoll within the woodland, overlooking lower ground to the east and southeast, and the landscape around it has its own geological texture worth noting. Glacial erratics, boulders deposited by retreating ice sheets thousands of years before the tomb was ever built, are scattered across the knoll and cluster more thickly about forty metres to the southeast. An ivy-covered tree grows hard against the tomb's southern side, rooted, apparently, in a natural erratic that has split into four pieces. The whole scene has an accumulated, layered quality: Neolithic construction, glacial deposition, and living woodland all pressed together. The tomb was recorded by the antiquarian T. J. Westropp between 1902 and 1904, and again by Ruaidhrí de Valera and Seán Ó Nualláin in their 1961 Survey of the Megalithic Tombs of Ireland, Volume I, covering County Clare. Both accounts describe a structure that was already in a collapsed state, and more recent observation suggests it has deteriorated further since. Notably, it never appeared on Ordnance Survey historic mapping, which means it slipped past that particular layer of official documentation entirely.