Stawamus Chief Mountain, Granite climbing area and mountain in Squamish, Canada.

Stawamus Chief Mountain is a granite formation near Squamish with three distinct peaks rising roughly 700 meters above Howe Sound, displaying vertical rock faces and tree-covered slopes. The rock consists of solid granite with varied terrain for hikers and climbers to navigate.

The mountain formed roughly 100 million years ago during the early Cretaceous period as magma cooled and solidified beneath the Earth's surface. This slow geological process created the granite structure visible to climbers and hikers today.

The Squamish name for the mountain is Siy̓ám̓ Smánit, where Siy̓ám̓ means "chief" as a social rank. Their tradition says the peak was a longhouse turned to stone by Xáays, the Transformer Brothers. The great cleft in the cliff is said to be a mark left by the skin of Sínulhka, a giant two-headed sea serpent.

Climbing all three peaks takes roughly six hours and uses wooden stairs, metal chains, and fixed anchors to help with the steep passages. Wear sturdy hiking boots and be prepared for exposed sections where the terrain rises sharply.

The deep gullies dividing the three summits formed where large blocks broke away along vertical, roughly north–south joints. The Zodiac Summit, north of Third Peak, has no proper trail, only faint tracks among the trees, and is the most isolated part of the mountain.