Megalithic tomb - portal tomb, Claggan, Dunfanaghy, Co. Donegal
On the western side of the Horn Head peninsula in County Donegal, approximately 400 metres from the sea cliff, stands a remarkable portal tomb that has weathered millennia of Atlantic storms.
Megalithic tomb - portal tomb, Claggan, Dunfanaghy, Co. Donegal
This ancient monument occupies the north side of a broad, shallow valley, offering sweeping views westward along Donegal’s northern coast and northwest to Tory Island, some 13 kilometres away. The tomb shares this landscape with another court tomb located nearly a kilometre to the southeast in the same townland, suggesting this area held particular significance for Ireland’s Neolithic communities.
The monument comprises a substantial cairn stretching 33.5 metres from east to west, its eastern end housing a narrow, roofless chamber. The cairn itself, constructed from slabs measuring up to half a metre across and reaching about 0.7 metres in height, displays the characteristic tapering form of portal tombs; it spans 13 metres wide at the chamber end before narrowing to approximately 5 metres at its western extremity. The partially grass-grown perimeter hints at the monument’s great age, whilst the accumulation of cairn stones within the chamber speaks to centuries of structural degradation.
The chamber, positioned 6 metres from the cairn’s rounded eastern end, faces east and originally measured at least 2 metres long and close to 1 metre wide. Its construction employed the classic portal tomb design, with each side formed by a portal stone and a single sidestone. The northern portal stone, which would stand 1.3 metres high if upright, now leans against its southern counterpart, whilst the southern sidestone rests against its adjoining portal stone. When Thomas Fagan documented the monument between 1845 and 1848, he found it in much the same state of collapse as it appears today, suggesting the tomb has remained largely undisturbed for at least two centuries, and likely much longer.





