Mount Gray is a 2,886-metre (9,469-foot) mountain summit located on the western border of Kootenay National Park in the Vermilion Range, which is a sub-range of the Canadian Rockies in British Columbia, Canada.

The Rockwall Trail is a scenic 55 kilometre (34 mile) traverse of alpine passes, subalpine meadows, hanging glaciers, and limestone cliffs, in some places in excess of 900 m (2,953 ft) above the trail.

[4] Mount Gray is composed of Ottertail limestone, a sedimentary rock laid down during the Cambrian period and pushed east and over the top of younger rock during the Laramide orogeny.

Gray, a University of British Columbia student and founding member of the British Columbia Mountaineering Club who drowned in the Kootenay River on July 10, 1917, along with Charles Wales Drysdale when their raft capsized and both were swept away while working on a geologic field survey.

Based on the Köppen climate classification, Mount Gray is located in a subarctic climate zone with cold, snowy winters, and mild summers.