This travel route follows a section of the 1920s auto trail, the Bankhead Highway. When completed, it traversed the country east-west, from Washington D.C. to San Diego, California. The route roughly parallels the north bank of the Red River, keeping to the high ground above the wide river bottoms that are sometimes inundated at flood stage. Throughout its course in Oklahoma, the Bankhead Highway and later U.S. 70 are reminiscent of Indian history. Along it were established the first schools and churches for the immigrant Choctaws and Chickasaws, their first mills and trading posts, and the few big plantations owned by enterprising people of mixed races.