What makes this particular rath slightly unusual is not any single dramatic feature but the accumulation of detail that survives: two concentric banks with a fosse, the ditch between them, enclosing a space that measures 52 metres across in both directions. The inner bank rises to nearly two metres internally and runs uniformly around the circuit, overgrown now with ferns and scrubby trees. The outer bank is more variable, solid enough from the north around to the north-east, then disturbed through the southern arc, dwindling in places to a low lip of only 20 centimetres before recovering slightly on the north-western side. A causewayed entrance, a gap left deliberately in the earthworks rather than cut through afterwards, opens to the north-east at four metres wide.

Raths, also called ring-forts, were the farmsteads of early medieval Ireland, typically enclosing a family's dwelling and outbuildings within a raised bank and ditch for security and to mark territory. Examples with two banks rather than one are considered a sign of higher social status, and this one in Donoure Middle fits that pattern. Somewhere slightly west of centre within the enclosure there may be a souterrain, an underground stone-lined passage typically used for storage or as a place of refuge, though this remains unconfirmed. More certain, and considerably more recent, is a lime kiln noted at the outer south-western edge of the enclosure on the Ordnance Survey six-inch map of 1842. A lime kiln was used to burn limestone to produce quicklime for agricultural use, and its placement here suggests the site was being actively farmed in the nineteenth century, with the ancient earthworks simply absorbed into the working landscape as a convenient boundary or elevated ground.