Lake Nyos is a crater lake in the Northwest Region of Cameroon, located about 315 km northwest of Yaoundé. Nyos is a deep lake high on the flank of an inactive volcano in the Oku volcanic plain along the Cameroon line of volcanic activity. A volcanic dam impounds the lake waters.
The Cameroon city of Yaoundé is over 300 km southeast of Nyos.
Since lake Nyos is Yaoundé is 