See the 1887 USGS topo survey of Fort Smith at:'

https://ngmdb.usgs.gov/img4/ht_icons/Browse/AR/AR_Fort%20Smith_260487_1890_125000.jpg

The proposed Beale Wagon Road/Butterfield Trail of 1860 {in Leflore Co. OK (CN IT)} can be easily see connecting across Poteau River into "downtown" Fort Smith at Carnall Avenue, by using the "enlarge" and "targeting" features of the map's magnifying glass.