What was once a rocky knoll marked clearly on the second edition of the Ordnance Survey 6-inch map has been completely transformed; today, the site is covered in forestry, with no visible traces of the ancient structure remaining above ground.

This type of enclosure would have been a common feature of the Irish countryside during earlier periods, likely serving as a defended farmstead or small settlement. The circular earthwork would have consisted of a bank and ditch system, creating a protective boundary around dwellings and livestock. Such sites are found throughout Donegal and represent centuries of agricultural and domestic life, though many, like this one at Creggan, have been lost to time and changing land use.

The documentation of this site forms part of the comprehensive Archaeological Survey of County Donegal, compiled in 1983 by Brian Lacey and his team of researchers. This survey catalogued field antiquities spanning from the Mesolithic period through to the 17th century, preserving knowledge of sites that might otherwise be forgotten. Whilst the physical remains at Creggan may have disappeared beneath the planted trees, its inclusion in the archaeological record ensures that this piece of local heritage remains part of Donegal’s historical narrative.