On the eastern fringe of Norwich, NY 23 passes over the Chenango River and leaves the valley holding the river and the city, utilizing a gap in the valley wall formed by Ransford Creek. The waterway ends shortly afterward; however, the route continues on, winding its way eastward into the town of New Berlin and the small hamlet of South New Berlin, situated in another valley surrounding the Unadilla River. Here, it connects to NY 8, another major north–south route. The route crosses the river just east of South New Berlin, putting it into the equally hilly and rural Otsego County. After of isolated areas, NY 23 encounters the village of Morris, the first of several villages along the route. In the village center, it briefly joins NY 51 along Morris' main street.