Little Chief Mountain is a 9,546-foot peak in Glacier National Park’s Lewis Range, rising south of Saint Mary Lake and standing out along the Going-to-the-Sun Road as a familiar feature of the park’s eastern landscape. George Bird Grinnell named it in 1887 for his friend Frank North of the U.S. Army, whose Pawnee name, “Little Chief,” had been given by his Pawnee Scouts. The mountain is composed of sedimentary rock formed from the Precambrian to the Jurassic, and its larger geologic setting reflects the Lewis Overthrust, which pushed older rock over younger Cretaceous layers. It remains an important scenic and geologic landmark.