The castle appears on Ordnance Survey maps from 1838 and 1929 as 'Farragh Castle', marking its location even as the physical structures were already disappearing from the landscape. The site represents a common defensive arrangement in Irish history, where a bawn; essentially a fortified courtyard with high walls; would protect both the castle and its inhabitants from raids and attacks.

Historical records provide tantalising glimpses of what once stood here. In 1838, Ordnance Survey letters noted that 'the ruins of a castle and bawne' existed in the townland of Farragh, with surveyors recommending that the site be marked on official plans. This documentation suggests the structures were already in ruins by the early 19th century, though significant enough to warrant recording. The bawn would have originally served as a defensive enclosure, typical of plantation era fortifications built throughout Ireland between the 16th and 17th centuries.

Today, no visible traces remain of either the castle or its protective bawn. The site has been reclaimed by pasture, leaving only its recorded history and map references to hint at the fortified complex that once dominated this patch of Mayo countryside. Like many such sites across Ireland, Farragh Castle and its bawn have become part of the invisible heritage of the landscape; their stories preserved in archives rather than stone.