Entirely speculative; the summit of Foel Goch is marked with an OS trig pillar, a post-medieval boundary stone and a small pile of stones. However, all three things sit on top of a circular mound, covered in turf and low vegetation. The mound itself is not recorded on the HER or Coflein, but it is clearly artificial. The summit to the west, Garnedd Goch, boasts a definite Bronze Age cairn. To me, the mound on top of Foel Goch is a strong candidate for archaeological evaluation as a possible cairn or round barrow.