Cove Bay is situated to the east of the ancient Causey Mounth, which road was built on high ground to make passable this only available medieval route from coastal points south from Stonehaven to Aberdeen. This ancient trackway specifically connected the River Dee crossing (where the Bridge of Dee is located) via Portlethen Moss, Muchalls Castle and Stonehaven to the south. The route was that taken by William Keith, 7th Earl Marischal and the Marquess of Montrose, who led a Covenanter army of 9000 men in the battle of the Civil War in 1639.