It was extended northward once more in the early 1970s to meet the Lake Ontario State Parkway.

North of Morganville, NY 237 crosses open terrain and passes over the New York State Thruway (Interstate 90) ahead of an isolated junction (formerly known as Pea Viner Corners) with NY 33—which parallels the Thruway along this stretch—near the northern town line.

After another 2.5 miles (4.0 km) of rural surroundings, the route enters the Holley village limits in the town of Murray, becoming South Main Street and turning back to the north upon passing under the Falls Road Railroad south of the village center.

[3] The highway continues north along South Main Street for three blocks to the center of Holley, where it intersects NY 31 northwest of the village's business district.

NY 237 continues on as North Main Street, passing by the Holley Central School District's elementary and high schools and crossing over the Erie Canal before exiting the mostly residential village.

[3] In Kendall, NY 237 heads north across mostly undeveloped areas to the vicinity of the town center, where it enters a more residential area as it meets NY 18 south of the hamlet of Kendall.

Although NY 237 terminates here, Kendall Road continues northward for another 300 yards (274 m) to serve a pair of lakeside communities.