page_title: Mount Cayley massif
hierarchical_section_title: Mount Cayley massif
caption_attribution_description: English: The Mount Cayley massif. Summits from left to right are Pyroclastic Peak, Mount Cayley and Wizard Peak.
context_page_description: The Mount Cayley massif is a group of mountains in the Pacific Ranges of southwestern British Columbia, Canada. Located 45 km north of Squamish and 24 km 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 2,000 m, Mount Cayley being the highest at 2,385 m. 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.
  Part of the Garibaldi Volcanic Belt, the Mount Cayley massif was formed by subduction zone volcanism along the western margin of North America. Eruptive activity began about 4,000,000 years ago and has since undergone three stages of growth, the first two of which built most of the massif. The latest eruptive period occurred sometime in the last 400,000 years with lesser activity continuing into the present day.
  Future eruptions are likely to threaten neighbouring communities with pyroclastic flows, lahars and floods.
context_section_description: The Mount Cayley massif is a group of mountains in the Pacific Ranges of southwestern British Columbia, Canada. Located 45 km (28 mi) north of Squamish and 24 km (15 mi) 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 2,000 m (6,600 ft), Mount Cayley being the highest at 2,385 m (7,825 ft). 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.
  Part of the Garibaldi Volcanic Belt, the Mount Cayley massif was formed by subduction zone volcanism along the western margin of North America. Eruptive activity began about 4,000,000 years ago and has since undergone three stages of growth, the first two of which built most of the massif. The latest eruptive period occurred sometime in the last 400,000 years with lesser activity continuing into the present day.
  Future eruptions are likely to threaten neighbouring communities with pyroclastic flows, lahars (volcanically induced mudslides, landslides and debris flows) and floods. To monitor this threat, the volcano and its surroundings are monitored by the Geological Survey of Canada (GSC). Eruption impact would be largely a result of the concentration of vulnerable infrastructure in nearby valleys.
caption: The Mount Cayley massif as seen from the southeast. Summits left to right are Pyroclastic Peak, Mount Cayley and Wizard Peak.
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