of Le Flore County. At this interchange, US-59 exits from the mainline to join US-271; continuing north through the interchange places the motorist on the Poteau Bypass, an unnumbered state highway. US-59 and US-271 proceed through Poteau, coming to an interchange at the southern terminus of SH-112, which is also the northern terminus of the Poteau Bypass. The two concurrent roads head north through the towns of Shady Point and Panama. North of Panama, US-59 and US-271 form the eastern terminus of SH-31. At Sunset Corner, US-59 turns to the west and US-271 turns to the east, ending the concurrency. SH-9 passes straight through this intersection from west to east; upon turning west, US-59 follows SH-9 for , splitting away southeast of Cowlington. Just north of this junction, US-59 widens to a four-lane divided highway. It crosses the Arkansas River on a bridge just downstream of the dam that impounds Robert S. Kerr Reservoir. Upon crossing the river, the highway enters Sequoyah County. Sequoyah and Adair counties US-59's first highway junction in Sequoyah County is with SH-141 west of Gans, where the latter highway reaches its western terminus. US-59 continues northward, crossing Wildhorse Mountain as well as Little Sallisaw Creek, just upstream of where it empties into Robert S. Kerr Reservoir. The highway then enters the county seat of Sequoyah County, Sallisaw, where it has an interchange with Interstate 40 at Exit 308. North of the interstate, US-59 intersects US-64, turning east to follow the latter route into downtown Sallisaw. US-59 splits away to the north, becoming a two-lane highway. North of town, the highway serves as the western terminus of SH-101. US-59 then passes through unincorporated Brushy. North of Brushy, the highway winds through the Brushy Mountains. The road exits Sequoyah County north of this group of mountains. The next county US-59 enters is mountainous Adair County. The route continues to follow a winding course as it makes its way northeast to unincorporated Cherry Tree. The highway continues northeast past Cherry Tree, before turning back to a due north course as it makes its way into the county seat of Stilwell. Here, the U.S. route has brief concurrencies with SH-100 and SH-51. US-59 leaves Stilwell, twisting through mountainous terrain alongside Peavine Creek until the stream's mouth at the Baron Fork of the Illinois River. The highway crosses the Baron Fork, then passes west of the unincorporated location of Baron.