Located between the heads of Bute Inlet on the east and Knight Inlet on the west, it is extremely rugged and glaciated.

Its highest summit is Whitemantle Mountain 2,985 m (9,793 ft).

The range is approximately 3,400 km2 (1,300 sq mi) in area and just south of the much higher and even more rugged Waddington Range, which is the highest part of the Pacific Ranges and also of the Coast Mountains.

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