A field system comprising an enclosure and a group of cairns is located on a level plateau to the south of the modern road across Brest Cwm Llwyd.
SN70641918: an irregularly shaped enclosure, open on the north, measuring overall 85m (E-W) by 60m, bounded by a discontinuous stony bank spread to 2m wide with maximum height 0.4m. From the south-west corner there projects, outwardly, a poorly defined bank which can be followed for 35m towards a rock outcrop.
The cairns form into two small groups: three stone piles wthin the enclosure and three more to the north and north-east. In overall size they vary between 3.5m and 8m across, heights between 0.3m and 0.6m. They are circular or oval in shape and are composed of consolidated stones and small boulders.
