Upper Missouri National Wild and Scenic River and Missouri B

This 149-mile section of the Missouri River is the only major portion that has been preserved in a natural and free-flowing state. It is a remarkable float trip for canoers and rafters, and is suitable for beginners. Along the way, habitats change from rolling grasslands to beautiful white cliffs to rugged badlands. Turkeys are common, and the chances of seeing bighorn sheep are very good, particularly after August of each year.

The main access points on the Marias are at Tiber dam, the Circle Bridge on state Highway 223 between Fort Benton and Chester, and U.S. Highway 87 at Loma. No visitor services are provided on the Marias river.