The main river in the county is the Current, which generally flows north to south through the center of the county before joining the Black in Arkansas. Other smaller streams are mostly also tributaries of the Black, chiefly the Little Black in the southeast. Most of the western part of the county is part of the Mark Twain National Forest, a federally protected area. | The main river in the county is the Current, which generally flows north to south through the center of the county before joining the Black in Arkansas. Other smaller streams are mostly also tributaries of the Black, chiefly the Little Black in the southeast. Most of the western part of the county is part of the Mark Twain National Forest, a federally protected area. |