Continuing from Skerray on the A 836 west the turnoff to the hamlet of Invernaver that lies at the mouth of the River Naver a mile (1½ km) south of Bettyhill. The Invernaver National Nature Reserve, designated in 1960, is now an SSSI. Invernaver is between the mouths of the Rivers Borgie and Naver.
On the west side of Bettyhill is one of the most important botanical sites in Scotland with a wide variety of lime and acid loving species such as crowberry, mountain avens, moss campion and bearberry. with notable dwarf shrubs.