The main wall, known as Wall A, curves gently west-northwest for 134 metres across the bogland. About 40 metres from its eastern end, a second, shorter wall intersects it at a right angle, running north-northeast to south-southwest for 20 metres. Together, they form a distinctive L-shaped pattern that would be invisible from ground level, concealed as they are beneath centuries of peat accumulation.

These field boundaries represent a fascinating glimpse into Donegal’s agricultural past, when this area was actively farmed before the blanket bog claimed the land. The walls were likely built as property markers or livestock enclosures, constructed with the same dry stone techniques seen throughout Ireland’s western counties. Their preservation beneath the bog is remarkable; the acidic, oxygen-poor conditions of the peat have kept the stonework intact whilst the landscape above transformed completely.

The walls were documented as part of the Archaeological Survey of County Donegal, a comprehensive project undertaken in 1983 to catalogue the county’s archaeological heritage from the Mesolithic period through to the 17th century. Such buried features are particularly valuable to archaeologists, as they provide evidence of settlement patterns and land use that predate the formation of Ireland’s extensive boglands, offering insights into how communities adapted to and shaped these landscapes thousands of years ago.