Its very plainness of designation hints at something passed over rather than celebrated, an island noted on maps and in archaeological registers but not yet fully accounted for in the public record.

Lough Conn sits within a glacially shaped landscape in north Mayo, its basin carved during the last ice age and subsequently flooded to form a lake that stretches roughly thirteen kilometres from north to south. The wider lough shore and its islands have long been of archaeological interest, as lakeside and island locations in Ireland frequently attracted early settlement, monastic activity, or defensive use. Islands in particular offered a degree of natural protection, and many across the Irish midlands and west bear traces of crannogs, small artificial or semi-artificial island dwellings used from the Bronze Age through to the early medieval period, or remnants of later ecclesiastical enclosures. Rocky Island is recorded as a site of archaeological significance, though the specific nature of what it contains or once contained remains, for now, only partially documented in publicly accessible form.