NY 190 begins at an intersection with NY 374 in the hamlet of Brainardsville as an eastward continuation of County Route 24. NY 190 progresses eastward through the hamlet, passing farms as it leaves. The route bends to the northeast soon after, intersecting with County Line Road, where NY 190 crosses into Clinton County, enters the town of Ellenburg and becomes known as Star Road. NY 190 crosses through Ellenburg as the same two-lane rural highway, passing farms as it bends northeast. During the elongated bend to the northeast, NY 190 intersects with CR 2. After a distance, NY 190 begins paralleling to the north of CR 5, which merges into the right-of-way near the hamlet of Ellenburg. CR 5 doubles as a former alignment of NY 190. In the hamlet, the route passes south of a mobile home park and intersects with NY 971L, a reference route that connects NY 190 to U.S. Route 11. At this junction, NY 190 turns eastward back through the town of Ellenburg, chaning monikers to Military Turnpike and remaining a two-lane rural arterial. NY 190 passes to the south of Lake Roxane, where the route becomes surrounded by trees and sporadic homes. After straightening out from a southeastern progression, NY 190 intersects with CR 8 in the town of Altona. Altona remains as rural as Ellenburg, with NY 190 intersecting CR 11 near the hamlet of Forest. While making a gradual turn to the southeast, CR 12 intersects, and NY 190 parallels power lines into the Miner Lake area. In Miner Lake, NY 190 has a short concurrency with CR 16. After Miner Lake, the route enters the hamlet of Robinson, where it begins another elongated turn, this time towards the south. Intersecting with the eastern terminus of CR 24, NY 190 enters Beekmantown, where it finishes the southern turn. After completing the turn, NY 190 intersects with CR 27 in the hamlet of West Beekmantown. The route remains rural, soon entering the town of Plattsburgh, where NY 190 intersects NY 374 for the second time, from Brainardsville. NY 190 bends to the southeast once again, intersecting the terminus of CR 26 before passing some businesses in Plattsburgh. NY 190 then intersects with NY 3, where the designation terminates. Military Turnpike continues eastward past the Clinton County Airport and through the town of Plattsburgh towards NY 22.
History
NY 190 was assigned as part of the 1930 renumbering of state highways in New York to an east–west highway extending from NY 374 in The Forge to US 11 in Ellenburg by way of Ellenburg Center. On April 1, 1980, ownership and maintenance of NY 190 from NY 374 eastward to its junction with Star Road southwest of Ellenburg was transferred from the state of New York to Franklin and Clinton counties as part of a pair of highway maintenance swaps between the state and the two counties. In return, the state assumed maintenance of Star Road, an east–west road linking NY 374 in Brainardsville to NY 190, and Military Turnpike, a highway connecting Ellenburg to NY 3 in the town of Plattsburgh. Both highways became part of a reconfigured NY 190, which now began in Brainardsville and ended west of the city of Plattsburgh. As a result of the realignment, NY 190 no longer directly connected to US 11 in Ellenburg; instead, the connection was now made by way of NY 971L, an unsigned reference route. The former routing of NY 190 west of Star Road is designated as CR 54 in Franklin County and CR 5 in Clinton County.
