Lake Ontario State Parkway

Lake Ontario State Parkway
Map of western New York with the Lake Ontario State Parkway highlighted in red
Route information
Maintained by NYSDOT
Length:	35.05 mi (56.41 km)
Existed:	early 1950s – present
Major junctions
West end:	NY 18 via NY 948A in Carlton
	NY 19 in Hamlin NY 390 in Greece
East end:	Lake Avenue in Rochester
Location
Counties:	Orleans, Monroe
Highway system
New York Highways Interstate U.S. State Reference Parkways

The Lake Ontario State Parkway is a 35.05-mile (56.41 km) parkway along the southern shore of Lake Ontario in western New York in the United States. The western end of the highway is at a partial interchange within Lakeside Beach State Park in Carlton, Orleans County. Its eastern terminus is at an intersection with Lake Avenue in the Charlotte neighborhood of the Monroe County city of Rochester. The parkway is internally designated by the New York State Department of Transportation (NYSDOT) as New York State Route 947A (NY 947A), an unsigned reference route. A short, 0.55-mile (0.89 km) connector between the west end of the parkway and NY 18 is unsigned New York State Route 948A.

The parkway mainline and the connector to NY 18 are both part of the Seaway Trail, a National Scenic Byway that extends along the shores of Lake Erie and Lake Ontario from northwestern Pennsylvania to the North Country of New York. The Lake Ontario State Parkway passes through mostly open and rural areas, except near Greece and Rochester, where the land surrounding the highway is more developed. It serves mostly as a connector between Rochester and several lakeside state parks and communities. From its western terminus to the Rochester suburbs, the parkway is the closest continuous roadway to the Lake Ontario shore.