Boulder Peak, Mountain summit in Glacier National Park, Montana, US

Boulder Peak is an 8,533-foot summit in the Livingston Range of Glacier National Park, Montana. Its northern slopes hold the remnant Boulder Glacier. The peak is made of Precambrian to Jurassic sedimentary rock, uplifted by the Lewis Overthrust fault beginning 170 million years ago.

Boulder Peak is made of sedimentary rock laid down in shallow seas between the Precambrian and Jurassic periods. About 170 million years ago the Lewis Overthrust fault pushed a slab of Precambrian rock roughly 3 miles thick, 50 miles wide and 160 miles long over younger Cretaceous rock, raising the peak. The remnant Boulder Glacier now lies on its northern slopes.

Boulder Peak lies in the Livingston Range of Glacier National Park, on the traditional territory of the Blackfoot, Salish and Kootenai peoples, who crossed these mountains to hunt and gather. The peak's name comes from the remnant Boulder Glacier on its northern slopes, a body of ice that carved the rocky basin below.

The route from Kintla Lake to this summit is challenging and requires advanced mountain skills and proper gear for a safe ascent. Hikers should be well-prepared with good endurance and experience in mountainous terrain.

Boulder Peak rises to 8,533 feet (2,601 m) in the Livingston Range, and the remnant Boulder Glacier lies on its northern slopes. The mountain is built of sedimentary rock formed in shallow seas, later lifted by the Lewis Overthrust fault.