Lismagh, in the townland of Eskerlevally in County Mayo, carries within it the Irish word lios, referring to a ringfort, the circular earthwork enclosures that served as farmsteads and defended homesteads across Ireland from the early medieval period onwards. Thousands of these monuments survive in various states of preservation across the country, yet each one occupies a particular patch of ground with its own local story, and Lismagh is one whose details remain, for now, largely unrecorded in the public domain.

Eskerlevally sits in a county that contains some of the most varied archaeological landscapes in Ireland, from megalithic tombs on the slopes of Céide Fields to crannogs, the artificial island settlements built on lakes, scattered across the midland bogs. The lios or ringfort type to which Lismagh most likely belongs was typically constructed between roughly the fifth and twelfth centuries, a single farmstead surrounded by one or more earthen banks and ditches, sometimes with a souterrain, an underground stone-lined passage, beneath it. Without further specific documentation available at present, it is not possible to say with confidence what form Lismagh takes, how many banks survive, or what condition the earthworks are in.