U.S. Route 177 (US-177) is a spur of U.S. Route 77. It currently runs for 233 miles (375 km) from South Haven, Kansas at US-81 to Madill, Oklahoma at US-70. It passes through the states of Kansas and Oklahoma. Route description Oklahoma US-177 begins concurrent with State Highway 199 at the US-70 junction near Madill, Oklahoma. From this point, it heads northwest, serving as the southern terminus of State Highway 1 and the main street of Mannsville. The route turns northward in Dickson, where it splits from SH-199. East of Gene Autry, it is the eastern end of SH-53. US-177 then runs through the Chickasaw National Recreation Area and the town of Sulphur, where it has a brief concurrency with SH-7. On the north side of Sulphur lies a partial interchange with the Chickasaw Turnpike. US-177 continues north into western Garvin County, serving as the eastern terminus of SH-29 and crossing SH-19 in Stratford. The route then cuts across the narrow eastern tip of McClain County, where it begins concurrencies with both State Highway 59 and State Highway 3W. The three highways then cross the Canadian River into Pottawatomie County, where they meet SH-39 at a four-way stop in Asher. Near unincorporated Pearson, SH-59 splits off to the east. US-177/SH-3W continue north to Tecumseh, where they have an interchange with SH-9. At this interchange, US-270 joins the concurrency. The three highways run along the west side of Shawnee. At the Interstate 40 interchange, SH-3W reunites with SH-3E, and the unified SH-3 (along with US-270) follows I-40. US-177 continues northward alone. After crossing into Lincoln County, US-177 meets US-62 in Jacktown. Just west of Warwick, it meets SH-66 (old Route 66), and then passes under Interstate 44 (the Turner Turnpike), with no interchange. I-44 is accessed through the SH-66 – Wellston (Exit 157) interchange. US-177 then continues north, connecting to the town of Carney via SH-40A, the shortest state highway in Oklahoma. West of Tryon, it intersects State Highway 105. It then enters Payne County just south of the Cimarron River. In Payne County, US-177 almost immediately passes through the town of Perkins. North of that community, it has a one-mile (1.6 km) concurrency with State Highway 33. It then passes through the county seat, Stillwater, the home of Oklahoma State University. There, it intersects SH-51. North of Stillwater, it serves as the western terminus of the Cimarron Turnpike Spur. Farther