This large hill, an outlier of the main Pumlumon Massif, rises to the approx west of Pen Pumlumon-Fawr across the Nant-y-Moch Reservoir. It bears two Bronze Age funerary cairns.
According to Coflein:
“Two cairns on summit of Drosgol hill, each c. 8-10m in diameter. Partly altered by creation into shelters . Drosgol cairns mentioned in Archaeology in Wales”.