Carrowmore is not a single monument but a sprawling complex, and the passage tomb recorded here as National Monument No. 153 is one of many clustered across this limestone plateau, each one a variation on the same ancient theme: a central chamber, a surrounding kerb of boulders, and a silence that has outlasted most of what came after it.

Passage tombs are a specific type of megalithic structure in which a narrow stone-lined passage leads to a burial chamber, the whole typically covered by a cairn or earthen mound. Carrowmore as a complex is among the oldest of its kind in Ireland, and the monuments here have been studied and catalogued by a number of researchers over the decades. Seán Ó Nualláin included detailed documentation of the site in his Survey of the Megalithic Tombs of Ireland, published by the Stationery Office in Dublin in 1989 as the fifth volume in the series, devoted entirely to County Sligo. That volume remains one of the more thorough systematic treatments of the region's prehistoric monuments, working through each tomb methodically and recording dimensions, condition, and structural features at the time of survey. The wider Carrowmore complex sits in the shadow of Knocknarea to the west, the great hill crowned by the unexcavated cairn traditionally associated with the legendary queen Medb, which gives the whole landscape a sense of prehistoric layering that is unusual even by Irish standards.