[2] The mountain range spans Aomori, Akita, and Yamagata prefectures.

[6][5]The highest peak of the mountain range is Mount Chokai (2,236m).

[7] The Dewa Mountains are predominately covered with Beech forest.

In 1993 this forest became one of the first areas in Japan listed as a UNESCO World Heritage Site.

[8] The range is the focal point for the Akinomine (秋の嶺 "peak of autumn") ritual, which is observed by the Mount Haguro lineage of Shugendō.