Pyramid Mountain is a subglacial mound located on the Murtle Plateau in Wells Gray Provincial Park, east-central British Columbia, Canada.
Pyramid Mountain erupted about 11,000 years ago. It was once mistaken for a cinder cone and is now known to have erupted underneath about 1,600 m (5,249 ft) of glacial ice. The Volcano erupted vigorously and cooled rapidly when the hot lava contacted the surrounding ice and melted it, creating an envelope of water around the rising volcano.
The result was a cement-like surface with smoothed cobbles of granite, schist, phyllite and other non-volcanic pebbles which were carried by the ice from many kilometers distant. As a result of this type of eruption, Pyramid Mountain has no crater and no lava flows stretching away from its base. The secondary cone to the east (best seen from Clearwater Valley Road near Hemp Creek) was not formed by a separate eruption, but was simply a slump when the ice melted away from Pyramid, releasing the pressure against its slopes.
Pyramid Mountain can be viewed from Wells Gray Park roads at three locations:
- 1 km south of Hemp Creek on Clearwater Valley Road
- Green Mountain viewing tower (see picture above)
- Majerus Farm trailhead on Clearwater Valley Road
to the top of Pyramid Mountain starts at Pyramid Campground. It is 4 km (2.5 mi) to the summit. The view is mostly southward to Trophy Mountain, Battle Mountain and Dunn Peak. The Murtle River flows along the east and south sides of Pyramid. In some weather conditions, the plume of spray over Helmcken Falls
can be seen to the west.
Elevation : 1,094 m (3,589 ft)
Prominence : 270 m (886 ft)