The High Rock Range forms the continental divide from Weary Creek Gap in the upper Highwood Valley south to the Crowsnest Pass.

Mount Muir is in a special location as it is the northernmost peak in the High Rock Range which stretches from the Crowsnest Pass. The mountains to the north are part of the Elk Range which terminates beyond Highwood Pass. Geologically, there does not seem to be much significance to this point at which the range forming the divide changes name. However, topographically there is a change. In the Elk Range to the north the mountains form more of a continuous wall whereas to the south in the High Rock Range the mountains are generally separate entities with passes and cols between them.