Though this single-ringed structure has vanished from modern Ordnance Survey maps, its traces were still discernible to mid-20th century investigators who found the remains measuring roughly 60 feet long by 40 feet wide. The enclosure’s banks, whilst low and poorly defined, revealed an intriguing connection to the neighbouring fort; a depression ran from the smaller enclosure towards the larger fortification, becoming increasingly pronounced as it crossed an intervening field wall before penetrating the outer defences of the main fort.

The 1946 survey that documented these features paints a picture of a landscape reclaimed by nature, with furze, hazel, and blackthorn overtaking much of the fort’s interior and making detailed examination challenging. The small enclosure sat just 100 feet west of the fort’s outer bank, suggesting these structures formed part of an integrated defensive or settlement complex. The connecting depression between the two features, which led directly into the fort’s outer fosse, hints at a deliberate relationship between the structures, possibly serving as an access route or drainage channel.

Whilst the enclosure itself has left little visible trace on the modern landscape, its documentation forms part of the comprehensive Archaeological Survey of County Donegal, which catalogues the county’s field antiquities from the Mesolithic period through to the 17th century. This systematic recording of even the most ephemeral archaeological features ensures that evidence of Ireland’s complex settlement history, from substantial hillforts to their smaller satellite enclosures, remains preserved in the historical record even as the physical remains continue to fade from view.