Visible only from the air, the site sits among rough grazing land and outcropping rock, its contours too subtle to read easily from the ground. What aerial survey reveals is a west-facing promontory, roughly 60 metres long by 40 metres wide, where the landward side appears to have been reinforced at some point in the past by a bank and fosse. A fosse is simply a defensive ditch, typically cut to complement an earthen bank, forming a barrier across the neck of a headland and effectively turning the natural geography into a fortified enclosure. It is a technique found at coastal promontory forts across Ireland, making use of cliffs and sea on the exposed sides and human-made earthworks where the land connects.

The site's existence in the archaeological record comes from the work of Markus Casey, whose 1999 unpublished MA thesis at the National University of Ireland, Galway surveyed the coastal promontory forts of counties Sligo, Mayo, Galway, and Clare. Casey's survey was conducted largely through aerial photography and existing records rather than fieldwork, and this particular site carries a telling note: it was not visited on the ground. That absence of ground-truthing is not unusual for remote island sites, but it does mean the structural traces remain interpreted rather than confirmed. The bank and fosse may be more or less pronounced than aerial images suggest, and the question of when the fort was constructed or used remains open. Promontory forts as a class span a wide chronological range in Ireland, with many associated with the Iron Age or early medieval period, though dating individual examples without excavation is rarely straightforward.