 The route did not connect to any other route in the legislative route system, and was removed on March 1, 1921, as part of a partial renumbering of the system.When the first set of posted routes in New York were assigned in 1924, NY 23 was assigned to an alignment extending from Oneonta to the Massachusetts state line west of Great Barrington by way of Catskill Park.The new route bypassed Kaaterskill Clove to the north, however, in favor of an alignment serving the hamlets of Windham and Cairo.