Crazy Peak is the highest peak in the Crazy Mountains, an isolated range of the Montana Rockies, in the United States. Crazy Peak dominates the surroundings, rising over 7,000 feet (2,100 m) above the Yellowstone River Valley, and is the highest peak in Montana north of the Beartooth Mountains, which are 50 miles (80 km) to the south. Crazy Peak is also the most topographically prominent peak in Montana. A small glacier exists on the northeast slope of the mountain.