The site consists of a rectangular enclosure measuring approximately 45 metres northwest to southeast and 40 metres transverse, surrounded by earthen banks and an external ditch. Two bastions project from the northeastern and southeastern corners, giving the fort its distinctive star-like shape when viewed from above.

The exact origins of this fortification remain tantalisingly unclear. Its bastioned design suggests it could date from the 16th or 17th century, when such military architecture was common across Europe during the age of gunpowder warfare. However, this style of defensive earthwork continued to be constructed well into the 18th century, and similar designs were even employed around signal towers built during the Napoleonic era in the early 1800s. Adding to the site’s intrigue, a pole or mast once stood at the centre of the enclosure, marked as ‘Old Telegraph’ on the first edition Ordnance Survey map from 1834, hinting at a possible communications role during more recent conflicts.

Today, these weathered earthworks stand as a silent testament to centuries of military engineering and strategic thinking. Whether built to defend against Cromwellian forces, guard against French invasion, or serve as part of an early warning system, the fort represents a fascinating piece of Ireland’s defensive heritage, its true purpose lost to time but its physical presence enduring on the Donegal landscape.