Local community information website including Historic Scotland description of Dounie Hillfort, (Scheduled Monument 11942) which can be reached by a waymarked walk from the A836.
Note that RCAHMS do not share the view that the masonry to be found here was defensive in nature... "The location and character of both the wall and the bank-and-ditch suggest that they were used for the control of stock." (JRS, GFG, IP, AM) 17/9/2013.
My suggestion is for people to climb the hill, enjoy the fabulous views across Dornoch Firth... and make up their own minds. I share some reservations owing to the paucity of visible defences to the east, but on balance I would say the western dry stone wall and associated bank and ditch are arguably too substantial for mere stock control?