Butterfield Overland National Historic Trail Designation Act This bill designates the trail extending approximately 3,292 miles and following the route operated by the Butterfield Overland Mail Company, known as the Ox-Bow Route, to transport mail and passengers between the eastern end points of St. Louis, Missouri, and Memphis, Tennessee, and extending westward through the states of Arkansas, Oklahoma, Texas, New Mexico, and Arizona, to the western end point of San Francisco, California, as the Butterfield Overland National Historic Trail. The United States shall not acquire for the trail any land or interest in land outside of the exterior boundary of any federally administered area without the consent of the owner of such land or interest in land.