It is located on the border of Shibetsu and Takinoue, Hokkaidō, Japan.

On January 6, 1978, Mount Teshio and the surrounding region was designated the Mount Teshio Prefectural Natural Park (天塩岳道立自然公園, Teshio-dake Dōritsu Shizenkōen).

[1] Mount Teshio is composed of felsic non-alkali rock from 15 to 7 million years old.

[2] At the base of the mountain there are abundant black woodpeckers as well as Japanese red foxes and Hokkaidō brown bears.

[1] Prominent alpine plants on the mountain are Rhododendron aureum and Diapensia lapponica.