. U.S. Route 104 , is a long east-west state freeway in Upstate New York, United States. It spans 6 countries and enters the vicinity of 4 cities-Niagara Falls, Lockport, Rochester, & Oswego-as it follow a routing largely parallel to that of the southern shoreline of Lake Ontario, next to a ridge of the older shoreline of Glacial Lake Iroquois.
The western end is at a junction with NY 384 in Niagara Falls, Niagara County, while its eastern end is at a connection with NY 13 in the town of Williamstown, Oswego County.
The part of US 104 among Rochester and the village of Webster east of the city is a limited-access freeway known as the Keeler Street Expressway west of NY 590 & the Irondequoit - Wayne Country Expressway east of NY 590; from Webster to Oswego, US 104 is a super 2 highway.