Castle Peak is the ninth highest summit of the Rocky Mountains of North America and the U.S. state of Colorado. The prominent 14,272-foot fourteener is the highest summit of the Elk Mountains and the Maroon Bells-Snowmass Wilderness. The peak is located 11.6 miles northeast by north of the Town of Crested Butte, Colorado, United States, on the drainage divide separating Gunnison National Forest and Gunnison County from White River National Forest and Pitkin County.