This substantial prehistoric monument, located in Gortnacart Glebe, measures approximately 24 metres east to west and 25 metres north to south, forming an almost perfect circle when viewed from above. Rising to a height of just over 2 metres, the mound features a distinctly rounded summit rather than the flat top sometimes seen in similar structures.

The mound's setting in good pasture land suggests this area has been valued for agriculture for generations, possibly even when the mound was first constructed. Its substantial size and careful construction indicate it held significant importance for the people who built it, though its exact purpose remains a matter of archaeological speculation. Such earthen mounds in Ireland served various functions throughout prehistory; some were burial monuments, others marked important territorial boundaries, and some may have served ceremonial or defensive purposes.

This particular site was documented as part of the comprehensive Archaeological Survey of County Donegal, compiled by Brian Lacey and his team in 1983. The survey catalogued field antiquities spanning from the Mesolithic Period through to the 17th century, providing invaluable records of Donegal's rich archaeological heritage. Today, the Gortnacart Glebe mound stands as a tangible link to Ireland's distant past, its weathered form a reminder of the ancient communities who once shaped this landscape.