1. Short title This Act may be cited as the Route 66 National Historic Trail Designation Act . 2. Designation of the Route 66 National Historic Trail Section 5(a) of the National Trails System Act ( 16 U.S.C. 1244(a) ) is amended— (1) by redesignating the second paragraph (31) (relating to the Butterfield Overland National Historic Trail) as paragraph (32); and (2) by adding at the end the following: (33) Route 66 National Historic Trail (A) In general The Route 66 National Historic Trail, a trail that includes all the alignments of U.S. Highway 66 in existence between 1926 and 1985, extending along a route of approximately 2,400 miles from Chicago, Illinois, to Santa Monica, California, as generally depicted on the map entitled Route 66 National Historic Trail, Proposed Route , numbered P26/141,279, and dated December 2017. (B) Availability of map The map described in subparagraph (A) shall be on file and available for public inspection at the Department of the Interior. (C) Administration (i) In general The Secretary of the Interior shall administer the Route 66 National Historic Trail in a manner that respects and maintains the idiosyncratic nature of the Route 66 National Historic Trail. (ii) Tribal consultation Consistent with Executive Order 13175 ( 25 U.S.C. 5301 note; relating to consultation and coordination with Indian Tribal governments) and all other applicable Federal law, the Secretary of the Interior shall conduct active, meaningful, and timely consultation with all affected Indian Tribes prior to undertaking an activity with respect to the Route 66 National Historic Trail that would have substantial direct impacts on 1 or more Indian Tribes. (D) Land acquisition The United States shall not acquire for the Route 66 National Historic Trail any land or interest in land that— (i) is located outside the exterior boundary of any federally managed area without the consent of the owner of the land or interest in land