The highest point in the state is the Black Mesa, in the Panhandle at . The lowest point is Little River east of Idabel in the southeast part of the state at above sea level. There are four mountain ranges in Oklahoma. They are the Ouachita, Arbuckle, Wichita and Kiamichi ranges. All of the ranges are in the southern part of the state. Forests make up about 24 percent of the state. The state is also known for having more man-made lakes than any other state in the country. These lakes cover more than with water.