The term 'Mountain State' is often used to refer to the state of Montana, which has 7 letters. Montana is located in the western United States and is known for its rugged terrain and mountain ranges. It is bordered by Idaho, Wyoming, North Dakota, and South Dakota, and is home to Glacier National Park and Yellowstone National Park. Montana is also known for its rich history of Native American tribes, its abundance of wildlife, and its wide open spaces.