Its eastern slopes are drained by the Afon Tafolog, a tributary of Afon Roe that flows through the village of Rowen before joining the River Conwy. It is also the final top on Carnedd Llewelyn's long northern spur.
Its eastern flanks are drained by the Afon Tafolog, a tributary of Afon Roe that flows through the village of Rowen before merging with the River Conwy. It is also the highest point on Carnedd Llewelyn's long northern extension.