Little Manatee Wild and Scenic River Act This bill designates a specified segment of the Little Manatee River in Florida as a component of the National Wild and Scenic Rivers System. The bill withdraws the federal land within the boundaries of the designated river segment from (1) entry, appropriation, or disposal under the public land laws; (2) location, entry, and patent under the mining laws; and (3) disposition under all laws relating to mineral and geothermal leasing or mineral materials.