Route 66 National Historic Trail Designation Act

This bill designates the Route 66 National Historic Trail under the National Trails System Act, covering all alignments of U.S. Highway 66 from 1926 to 1985 (approximately 2,400 miles from Chicago, Illinois, to Santa Monica, California). It requires the Secretary of the Interior to administer the trail while respecting its unique character and consulting with affected Native American tribes. Key provisions limit federal land acquisition to no more than 1/4 mile on either side of the trail, prohibit eminent domain, clarify the trail is not part of the National Park System, and ensure existing energy development and transportation activities remain unaffected. The designation does not require new permits or alter current easement authorities for existing infrastructure.