East of Syracuse East of Syracuse, the route passes through a narrow portion of the town of Onondaga and the hamlet of Southwood before entering the adjacent town of DeWitt. It continues east, serving Clark Reservation State Park as it heads toward the community of Jamesville, located at the northern end of the Jamesville Reservoir on Butternut Creek. Here, NY 173 intersects NY 91 in the center of the hamlet. Past Jamesville, the homes that had lined the highway give way to open areas to the south and large quarries to the north. The route passes north of the Onondaga County Correctional Facility just east of Jamesville. NY 173 continues on into the town of Manlius, where the homes gradually return as the highway enters the village of Manlius. Inside the village limits, the route becomes surrounded by homes once again as it crosses over Limestone Creek and enters the village's business district. Here, it intersects and briefly overlaps NY 92 for roughly between Fayette and Washington Streets. At Washington Street, NY 92 turns to the southeast towards Cazenovia while NY 173 continues northeastward out of the village. Now back in the surrounding town of Manlius, NY 173 passes south of Fayetteville–Manlius High School before entering another rural area near a point known as Eagle Village. The route continues northeast from there into Madison County. Upon crossing the county line, NY 173 initially turns slightly eastward to follow a less pronounced northeasterly alignment. However, as the route approaches the Chittenango Creek valley, it gradually turns northward. At Brinkerhoff Hill, NY 173 enters the Chittenango village limits and descends into the valley, where it ends at an intersection with NY 5 in the village center at the base of the valley. History The portion of modern NY 173 between NY 175 in Onondaga and NY 5 in Chittenango was originally part of the original Seneca Turnpike. The Seneca Turnpike was originally the longest road in the state of New York when it was built in the 1800s. NY 173 was assigned as part of the 1930 renumbering of state highways in New York to the entirety of its modern alignment. Although NY 173 itself has not changed since that time, other routes have been overlaid on parts of NY 173 over the years. The segment of NY 173 between NY 175 in Onondaga and the east end of the NY 92