The site appears on Ordnance Survey 6-inch maps marked as an antiquity, though today visitors would find little more than a levelled mound in the landscape. Archaeological surveys have noted that whilst the hillock’s position and local tradition hint at the possibility of an ancient monument once standing here, no definitive traces remain to confirm what form it might have taken.

The location itself speaks to why it might have attracted attention in antiquity; situated on good agricultural land with commanding views across the surrounding countryside, it would have made an ideal spot for a cairn or other prehistoric structure. Such elevated positions were often chosen by our ancestors for burial monuments, offering both practical advantages for visibility and perhaps spiritual significance in being closer to the sky.

The site was documented during the comprehensive Archaeological Survey of County Donegal, conducted in 1983, which catalogued field antiquities from the Mesolithic period through to the 17th century. Whilst Marcagh’s Knowe may not offer the dramatic ruins found elsewhere in Donegal, it serves as a reminder of how many ancient sites exist only in place names and local memory, their physical presence long since erased by time and agriculture.