“The Deadly Bells” 

A US Forest Service sign on the access trail refers to these mountains as “The Deadly Bells” and warns would-be climbers of “downsloping, loose, rotten and unstable” rock that “kills without warning”. Unlike other mountains in the Rockies that are composed of granite and limestone, the Bells are composed of metamorphic sedimentary mudstone that has hardened into rock over millions of years. Mudstone is weak and fractures readily, giving rise to dangerously loose rock along almost any route. The mudstone is responsible for the Bells’ distinctive maroon color. The Bells got their “deadly” name in 1965 when eight people died in five separate accidents.