 The tops of Cribin Fawr are flat expanses of peat-hags.On the eastern flanks Bilberry ("Vaccinium myrtillus") grows in abundance with Cowberry ("Vaccinium vitis-idaea") common on the highest ground.Half a mile to the west of the peak of Cribin Fawr at a high point of is a stone boundary marker dated 1861 and inscribed CCC and bearing a benchmark.