While it appears clearly marked on the 2nd and 3rd editions of the Ordnance Survey 6-inch maps, no physical trace remains today. The site occupied what was described as fairly good agricultural land on a gentle southern slope, positioned above a small stream that likely provided water for any settlement or agricultural activities that took place there.

These circular enclosures, known as ringforts or raths, were amongst the most common archaeological features in medieval Ireland, typically dating from the early Christian period through to the 12th century. They served as protected farmsteads for prosperous farmers and their families, with the raised earthen bank and external ditch providing both drainage and defence. The complete disappearance of the Tullydush Lower enclosure is unfortunately common; centuries of agricultural improvement, particularly during the 19th and 20th centuries, saw thousands of these monuments levelled for more intensive farming.

The documentation of this lost site comes from the comprehensive Archaeological Survey of County Donegal, compiled by Brian Lacey and his team in 1983. This survey represents one of the most thorough catalogues of Donegal’s archaeological heritage, recording everything from Mesolithic sites to 17th-century structures. Even though the physical enclosure at Tullydush Lower has been erased, its inclusion in historical maps and archaeological records ensures that this piece of Donegal’s medieval landscape isn’t entirely forgotten.