Crypt Peak is an 8,579-foot (2,615 m) mountain summit located in Glacier National Park, in Glacier County of the U.S. state of Montana. It is situated along the Canada–United States border, above Crypt Lake, and is partially within Waterton Lakes National Park. Crypt Peak is part of the Lewis Range, and is approximately three miles east of Waterton Lake. Topographic relief is significant as Crypt Peak rises over 2,100 feet (640 meters) above Crypt Lake in approximately one-half mile (1.6 km), and 4,400 ft (1,340 m) above Waterton Lake in three miles (4.8 km). Precipitation runoff from the mountain drains west to Waterton Lake, and east to Belly River. This geographical feature's name has not yet been officially adopted by the United States Board on Geographic Names.