sentences:  The route heads northeast as a narrow, two-lane road through a rural, open area as a county-maintained highway, overlapping with the unsigned CR 57 for until the Montgomery–Fulton county line.State maintenance of NY 331 begins at the boundary, which is signed as NY 331's southern terminus.Past the county line, the route widens slightly as it traverses rolling hills in a rural part of the town of Oppenheim.