It lends its name to a recorded monument, though the precise nature of that monument, whether earthwork, enclosure, or something older still, remains difficult to pin down from what is currently available in the public record.

The townland itself has a long association with settled life along the Corrib corridor, a stretch of territory that saw early medieval activity, later Norman influence, and the gradual layering of history that tends to accumulate wherever water and land meet conveniently. The name Menlough derives from the Irish Mionloch, meaning small lake, a quiet geographical description that hints at a landscape shaped as much by water as by the people who moved through it. Without more detailed survey information yet in circulation, the specific monument recorded here cannot be described with confidence, and speculation would do it a disservice.