The Crazy Mountains, often called the Crazies, are a mountain range in the northern Rocky Mountains in the U.S. state of Montana. Spanning a distance of 40 miles (64 km), the Crazy Mountains are located between the Musselshell and Yellowstone rivers. The highest peak is Crazy Peak at 11,214 feet (3,418 m). Rising over 7,000 feet (2,130 m) above the Great plains to the east, the Crazies dominate their surroundings and are plainly visible just north of Interstate 90.
The Crazy Mountains form an isolated island range east of the Continental Divide. Others include the Castle Mountains, Little Belt Mountains, Big Snowy Mountains, Little Snowy Mountains, Highwood Mountains, Sweet Grass Hills, Bull Mountains and, in the southeastern corner of the state near Ekalaka, the Long Pines and Short Pines.
Elevation: 11,214 ft (3,418 m)