Washington County has contained the Ozark Trail , Trail of Tears , and the Butterfield Overland Mail route . Today , Interstate 49 serves as the county 's main thoroughfare , and connects the University of Arkansas with Fort Smith and Interstate 40 to the south and other NWA cities to the north . Future plans call for Interstate 49 to be extended to ultimately connect New Orleans , Louisiana with Kansas City , Missouri through Washington County
Trail of Tears
Trail of Tears
Washington County, Arkansas