Mount Septimus is the western summit of a jagged mountain on Vancouver Island, British Columbia, Canada, located 50 km (31 mi) southeast of Gold River and 10 km (6 mi) south of Buttle Lake.

The highest peak on the massif is Mount Rosseau, located 600 m (1,969 ft) to the west.

[1] There are a couple of possibilities of the source of Mount Septimus' name recorded in the BC Geographical Names Information System:[2] "By some, thought to be descriptive – Septimus being a mountain of seven peaks."

[note that this assumption is likely made because of the mountain's proximity to Price Creek and a mistaken assumption that Price Creek was named for Capt John Price, HMS Scout, under whom Septimus Evans was surgeon before joining the hired vessel Beaver under Captain Pender, 1868.]

Source: Canadian Geographical Names Database, Ottawa Mount Septimus has four established access routes: Note: From Cream Lake, the south aspect can be accessed by ascending the wide couloir to the shoulder west of Mount Septimus' summit.