This defensive enclosure, measuring roughly 28.5 metres from northwest to southeast and 20.5 metres from northeast to southwest, branches off from the northwestern side of the castle’s inner bawn. Today, visitors will find a structure that time has not been kind to; the walls, originally about 1.6 metres thick, have largely collapsed and now stand between one and two metres high for most of their length. Only a small section of the northeastern wall hints at the structure’s former imposing presence, where it still reaches heights of three to four metres with a thickness of two metres.

The current state of the outer bawn tells a story of centuries of neglect and nature’s reclamation. Thorn bushes have taken root throughout the stonework, whilst piles of rubble line the interior face of the northwestern wall, suggesting gradual decay rather than sudden destruction. Archaeological surveys from 1989 documented additional features that have since become harder to distinguish, including an eight-metre stretch of drystone wall that once extended from the north angle of the inner bawn, running northwest towards another section of high masonry wall of similar length.

Historical maps provide valuable clues about the bawn’s evolution over time. The 1839 Ordnance Survey six-inch map shows a building within this outer enclosure, and remnants of what appears to be its gable wall can still be traced amongst the ruins. This structure was likely a later addition to the medieval defences, possibly serving agricultural or domestic purposes as the military importance of such fortifications waned. A field wall, built along what was probably the building’s northwestern wall line, represents yet another layer of adaptation, showing how these ancient defensive structures were repeatedly modified to suit the changing needs of their inhabitants over the centuries.