The geography of Oklahoma features diverse landscapes, including plains, hills, and forests. The state is primarily located in the Great Plains region of the United States, with the Central Great Plains to the west and the Ozark Mountains to the east. Major rivers, such as the Arkansas River and the Red River, flow through the state, providing important water resources. Oklahoma experiences a variety of climates, ranging from humid subtropical in the southeast to semi-arid in the west. The state is also known for its rich soil, making it suitable for agriculture, particularly in the Red River Valley.