This ecoregion encompasses the mountains and highland areas of the border region between Nigeria and Cameroon. Most of the ecoregion lies within a narrow rectangle of 180 km by 625 km, oriented southwest to northeast and originating about 50 km inland of Mount Cameroon.It covers the Rumpi Hills, the Bakossi Mountains, Mount Nlonako, Mount Kupe and Mount Manengouba. Mt. Cameroon is an active volcano that sits near the coast and rises from this mountain range, but is considered a separate ecoregion from the older, non-volcanic Cameroonian Highlands Forests.