This ringfort, or rath as it's known locally, consists of a raised platform that drops steeply on its southern side towards the river below. Though time and the elements have taken their toll, the western side still preserves an impressive arc of earthen banking, stretching 12 metres long and standing up to 1.5 metres high in places.

The fort's defensive features, whilst badly damaged, remain discernible to the trained eye. Faint traces of an external fosse, a defensive ditch that would have ringed the settlement, can still be detected in the ground's subtle undulations. Even less distinct are the possible remnants of an outer bank, which would have formed an additional layer of protection for those dwelling within. These earthworks represent a common form of enclosed farmstead that dotted the Irish countryside from the early medieval period onwards, typically housing extended families and their livestock.

Archaeological surveys have documented hundreds of similar sites across County Donegal, each one a testament to the dispersed rural settlement patterns that characterised Ireland for centuries. This particular example at Legland, recorded in Brian Lacey's comprehensive 1983 archaeological survey of the county, offers a tangible connection to the farming communities who once called this river valley home, shaping the land with little more than muscle, timber and earth.