High Quality Content by WIKIPEDIA articles! U.S. Route 9 (US 9) is a part of the U.S. Highway System that runs from Laurel, Delaware, to Champlain, New York. In New York, US 9 extends 325.01 miles (523.05 km) from the George Washington Bridge in Manhattan to an interchange with Interstate 87 just south of the Canada – United States border in the town of Champlain. US 9 is the longest north–south U.S. Highway in New York; additionally, the portion of US 9 in New York accounts for more than half of the highway`s total length.