As well as the two massive cairns, there are two other possible BA cairns on on near the summit of Cefn yr Ystrad (“Ridge of the Vale”?). Coflein descriptions:
Garn Felen III (SO0882513838)
A scatter of stones 7m diameter which may be the base of a cairn. On top is a cone-shaped rock pile, base diameter 1.5m and 1.5m high, probably a much later clearance cairn. In a very prominent location, with steep drop and view to N.
Garn Felen II (SO0854513843)
Located on a slope. Outer ring of rubble stone, 6-8m diameter, on all sides except uphill. In the centre is a conical mound 2.5m across and 1m high, probably the result of later clearance.