There is a gap in the bank, about 6 metres wide, opening to the south-south-east, which would once have served as the entrance. What is less visible today is what was lost around 1970, when a second outer bank was levelled into the fosse, the defensive ditch that originally separated the two circuits of earthwork. That act of clearance, common enough across rural Ireland as land was improved for grazing, erased a layer of the site's original complexity in a single season.

This is a rath, the most widespread type of early medieval settlement in Ireland, typically dating from roughly the sixth to the twelfth centuries. A rath is essentially a farmstead enclosed by one or more earthen banks and ditches, the residence of a farming family of some standing in the old Gaelic social order. The presence of two banks at Reavouler, even if one survives only as a flattened trace, suggests the site belonged to a slightly more substantial category than the single-banked norm. Adding further interest is a possible souterrain in the interior. A souterrain is an underground stone-lined passage or chamber, built beneath or beside the dwelling area and used variously for storage, refuge, or both. Whether the one at Reavouler is fully intact or only partially surviving is not recorded, but its potential presence beneath the grassed interior gives the enclosure a quietly layered quality, the visible earthwork hinting at structures that continue downward out of sight.