Historical Ordnance Survey maps from the 19th century documented this ancient structure, which sat atop a modest rise in the terrain, surrounded by well-tended farmland that slopes down towards a stream on its southern edge. Today, visitors to the area would find no visible trace of this archaeological feature; the land has been thoroughly cultivated over the generations, erasing any surface evidence of the enclosure that once marked this spot.

The ringfort belonged to a type of defensive homestead that dotted the Irish countryside from the early medieval period onwards, typically dating from around 500 to 1200 AD. These circular or near-circular earthen enclosures, known in Irish as ‘ráth’ or ‘lios’, served as fortified farmsteads for prosperous farmers and their families. The Altashane example appears to have been a single-ringed variety, meaning it had one defensive bank and ditch, rather than the multiple rings found at more elaborate sites.

This particular site was recorded as part of the comprehensive Archaeological Survey of County Donegal, compiled in 1983 by Brian Lacey and his team of archaeologists. Their work documented hundreds of field monuments across the county, from prehistoric stone circles to 17th-century tower houses, creating an invaluable record of sites that, like this ringfort, might otherwise be forgotten. Whilst the physical structure has been lost to time and agriculture, its inclusion in both historic maps and modern surveys ensures that this piece of Donegal’s ancient heritage remains part of the historical record.