Fire Mountain Scout Camp

Ancient Landslide

Cultus Mountain

Looking up at Cultus Mountain you can see the expansive concave depression. This was shaped by an ancient landslide event that took place sometime during the past 15,000 years after the last Ice Age. The full range of this landslide event has been detected through LIDAR mapping. The landslide flowed westward between Pigeon Creek and Cold Spring Creek, splitting into two sections that stretched for more than 1.5 miles. A later, more recent landslide evident through LIDAR mapping flows south across the older landslide. The slide is believed to have resulted from a failure of the weak metamorphosed sedimentary rock, Darrington Phyllite; landslide debris also includes glacial sediments. Landslide events in this area may have been triggered by seismic activity along the Devil’s Mountain Fault Zone located south of Fire Mountain Scout Camp.

The Devils Mountain Fault Zone, located just south of Fire Mountain Scout Camp, is an approximately 78 mile long fault line that runs east to west, through the town of Darrington and westward to Vancouver Island, within 2 miles of downtown Victoria, British Columbia. It is an active fault zone on which at least one large earthquake has taken place within the past 2,000 years. Recent research estimates that this fault has the potential to generate a strong earthquake of as large as magnitude 7.5 on the Richter scale, generating catastrophic impact across the Puget Sound region, western Washington, and Vancouver Island.

Walker Valley Geology

Crystal Falls

Crystal Falls, located at Fire Mountain, offers a beautiful and vivid representation of the fascinating geology of the Walker Valley. The falls are formed by an andesite escarpment, showing exposed coal and sandstone. Beyond the falls in the foothills of the Cultus Range is the Devil’s Rock Garden, an isolated talus field with massive boulder formations. Located on land owned by the Washington Department of Natural Resources, the Devil’s Rock Garden was the site of Fire Mountain’s rock climbing program during the 1980s.

Devil's Rock Garden

The Walker Valley is internationally famous for its mineral specimens, including large geodes containing crystals of amethyst, clear quartz, calcite, siderite, and gem-quality agate. It is the only place in its surrounding volcanic region in which geodes have been found, reflecting the Valley’s unique geologic history. Geologists have suggested, based on the Walker Valley’s minerology, that the following sequence of events led to the creation of the geode zone: