New York State Route 23 (NY 23) is an east–west state highway in the eastern portion of New York in the United States. It extends for from an intersection with NY 26 in the Central New York town of Cincinnatus in Cortland County to the Massachusetts state line in the Berkshire Mountains, where it continues east as that state's Route 23. Along the way, it passes through many communities, including the cities of Norwich and Oneonta. Outside of the communities, the route serves largely rural areas of the state and traverses the Catskill Mountains in the state's Central New York Region. NY 23 crosses the Hudson River at Catskill via the Rip Van Winkle Bridge. Sections of what is now NY 23 were part of unsigned legislative routes as early as 1908; however, NY 23 itself was not assigned until 1924. At the time, the route extended from Oneonta to Massachusetts and followed a slightly different alignment from Cairo to Claverack via Hudson that took the route along modern County Route 23B (CR 23B) in eastern Greene County. NY 23 was extended west to Norwich in the mid-1920s and to NY 26 in northwestern Chenango County in 1930. The route was gradually moved onto its current alignment between Cairo and Claverack in the 1950s and 1960s, and realigned on its western end in 1984 to serve Cortland County. Route description NY 23 has three distinct sections: its western third in Central New York and the Central New York Region (formerly Leatherstocking), the middle in the Catskills, and east of the Hudson River. Most of the route is maintained by the New York State Department of Transportation (NYSDOT); however, some sections are either locally maintained or owned by other agencies. In the city of Norwich, NY 23 is entirely city-owned and maintained. Farther east in the city of Oneonta, the route is city-maintained from the western city line to James F. Lettis Highway. Finally, the Rip Van Winkle Bridge and its approaches are maintained by the New York State Bridge Authority (NYSBA). Central New York The highway begins at a junction with NY 26 in Cincinnatus, a town in eastern Cortland County. It heads east across the Otselic River and through the hamlet of Lower Cincinnatus before curving to the northeast and crossing into Chenango County very soon afterward. Across the county line, it continues northeast through a lightly developed valley