The monument stretches for at least 10 metres along a south-southwest to north-northeast alignment, its distinctive wedge shape still clearly visible despite being deeply embedded in the surrounding bog. The structure sits on hilly ground that extends westward towards Glen Lough, occupying a prominent position that overlooks the inner reaches of Mulroy Bay some 2.3 kilometres to the southeast.

The tomb consists of a tapered gallery that narrows from 1.9 metres at its widest point to just 1.35 metres near a transverse slab that marks off what appears to be a rear chamber. This eastern endchamber, at least 1.8 metres long, narrows further to just 0.8 metres at the back. The entire structure is covered by several roofstones, some cracked but still in position, laid directly on the sidestones. These massive slabs, the largest measuring 2.9 metres by 0.9 metres, create a covered passage that floods periodically; the current floor lies between 0.7 and 1 metre below the roof level. The entrance features an intriguing arrangement where three stones narrow the gallery to 1.2 metres, possibly forming what archaeologists interpret as a portico.

Surrounding the tomb, traces of the original outer walling poke through the bog at intervals, whilst a narrow grassy mound approximately 15 metres long, 7 metres wide and 0.8 metres high envelops much of the structure. Historical records dating back to 1827 describe this as a “long cave” or “giant’s bed”, and an Ordnance Survey revision from 1848-9 notes that the monument was in much the same condition then as it appears today. Despite centuries of bog growth threatening to swallow it whole, this wedge tomb remains one of Donegal’s more intact megalithic structures, offering a tangible connection to the Bronze Age communities who built these elaborate burial chambers across Ireland’s Atlantic coast.