The purpose of this legislation is to officially designate the Route 66 National Historic Trail as part of the National Trails System. This trail represents a significant piece of American history, tracing the original U.S. Highway 66 from Chicago, Illinois, to Santa Monica, California, over a distance of approximately 2,400 miles. The objective is to recognize and preserve the cultural and historical importance of Route 66, which has been a symbol of American travel and exploration.