NY 180 begins at an intersection with
NY 3 in the
Hounsfield hamlet of Baggs Corner. A state-maintained continuation of
County Route 66 (CR 66), NY 180 runs northeast through the wide fields of Hounsfield, passing east of the
Black River Bay, and after bending north, the route passes west of
Watertown International Airport. NY 180 soon meets at a junction with
NY 12F, which runs east past the entrance of the airport. Crossing over the
Black River, the route enters the village of
Dexter. Now known as Brown Street, NY 180 runs north through the center of the village, reaching a junction with Grove Street, marking the northern edge of the village. Continuing north, NY 180 enters the town of
Brownville, crossing through the rural town as a two-lane road. The route makes a bend to the northeast and enters the hamlet of Limerick, where it crosses a junction with
NY 12E. Now paralleling the
Perch River, NY 180 runs northeast through the fields, reaching a junction with
CR 54 (Depauville Road). After CR 54, NY 180 bends northward, bypassing the hamlet of Perch River, where the namesake waterway merges into
Perch Lake. NY 180 bends northeast again, crossing a junction with
CR 128 and entering the town of
Clayton. Now in Clayton, NY 180 crosses northeast into a junction with
NY 12. The stretch through Clayton is short and rural, before the route crosses into the town of
Orleans. A distance into Orleans, the route enters the hamlet of Stone Mills, a residential community in which NY 180 serves as the main thoroughfare. North of Stone Mills, the route bends to the north, remaining a two-lane rural road through Orleans. NY 180 soon bends to the northwest, reaching a junction with the terminus of
CR 12. The route soon bends northeast again, passing Grove Cemetery as it enters the hamlet of
La Fargeville. Paralleling the
Chaumont River, NY 180 enters La Fargeville as the two-lane Main Street. Crossing the Chaumont River, NY 180 reaches a junction with Sunrise Avenue, where it turns west while the right-of-way becomes
NY 411. NY 180 goes west on Clayton Street for one block, turning north onto another road while Clayton becomes
CR 181. Continuing northwest through the town of Orleans, NY 180 passes some residences in the rural town, eventually bending northward to a junction with
CR 3 (East Line Road). Just north of CR 3, the route passes La Golf Club. North of the golf course, NY 180 turns northeast, reaching the hamlet of Omar. In Omar, NY 180 reaches the western terminus of
CR 13, which runs parallel to
I-81 nearby. NY 180 runs northwest out of Omar, soon turning westward and crossing over Mullet Creek. Less than a block from the Mullet River, NY 180 reaches its northern terminus, a junction with NY 12 just south of
Grass Point State Park. Northwest of the junction, the right-of-way continues to the
St. Lawrence River and Reed's Point Road as Fishers Landing Road, which was formerly designated as
CR 195. ==History==