Mattz v. Arnett

Our decision in this case turns on the resolution of the narrow question whether the Klamath River Indian Reservation in northern California was terminated by Act of Congress or whether it remains “Indian country,” within the meaning of 18 U. S. C. § 1151. When established, the reservation was described as “a strip of territory commencing at the Pacific Ocean and extending 1 mile in width on each side of the Klamath River” for a distance of approximately 20 miles, encompassing an area not exceeding 25,000 acres. This description is taken from President Franklin Pierce’s Executive Order issued…