The Mount Cayley massif is a group of mountains in the Pacific Ranges of southwestern British Columbia, Canada. Located north of Squamish and west of Whistler, the massif resides on the edge of the Powder Mountain Icefield. It consists of an eroded but potentially active stratovolcano that towers over the Cheakamus and Squamish river valleys. All major summits have elevations greater than , Mount Cayley being the highest at . The surrounding area has been inhabited by indigenous peoples for more than 7,000 years while geothermal exploration has taken place there for the last four decades.