The ringfort at Lisrobert sits near the summit of a ridge on an east-facing slope in County Mayo, and whatever inconvenience the fence causes to the archaeology, it does nothing to diminish the site's position. The ground opens up to the east in a commanding sweep, the kind of view that would have made the place worth settling in the first place.

A rath, as this type of monument is classified, is a ringfort defined by earthen rather than stone boundaries, typically enclosing a farmstead of the early medieval period, roughly between the fifth and twelfth centuries. They are the most common field monument in Ireland, yet each one occupies its ground in its own particular way. This one is a circular enclosure measuring thirty-five metres across from east to west, ringed by a low earthen bank that rises only about twenty centimetres above the surrounding pasture for much of its circuit, from the south-west around to the east. It is not a dramatic survival, but it is a legible one. What makes the setting quietly notable is that another ringfort lies roughly two hundred and fifty metres to the north-east, suggesting that this part of the Lisrobert ridge was home to more than one household during the period when these enclosures were in active use. The site was recorded as part of an archaeological survey of the Ballinrobe district, including the areas around Lough Mask and Lough Carra, compiled by D. Lavelle and published in 1994 by the Lough Mask and Lough Carra Tourist Development Association.