Crazy Peak, elevation 11214 ft, is the highest peak in the Crazy Mountains, an island range of the Montana Rockies, in the United States. Crazy Peak dominates the surroundings, rising over 7000 ft above the Yellowstone River Valley, and is the highest peak in Montana north of the Beartooth Mountains, which are 50 mi 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. The mountain is located on private land within the Gallatin National Forest.

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