Portal tombs, sometimes called dolmens, are among the most visually distinctive of Ireland's prehistoric monument types: typically two tall upright portal stones at the entrance, a lower back stone, and a large capstone tilted at an angle across the top, the whole arrangement once covered by an earthen or stone cairn that has long since eroded away. What remains is the skeleton of a burial structure built somewhere between four and six thousand years ago.

The Crowagh example is catalogued in Seán Ó Nualláin's Survey of the Megalithic Tombs of Ireland, Volume V, County Sligo, published by the Stationery Office in Dublin in 1989. That volume represented a systematic effort to document the full range of megalithic tomb types across Sligo, a county unusually well supplied with prehistoric monuments. Ó Nualláin's work remains one of the foundational reference points for understanding how these structures are distributed across the Irish landscape, and the Crowagh tomb forms part of a broader pattern of portal tomb construction in the northern and western counties during the Neolithic period.