 Interstate 87 ( I @-@ 87 ) is a 333 @.@ 49 @-@ mile @-@ long ( 536 @.@ 70 km ) Interstate Highway located entirely within the U.S. state of New York , and is part of the main highway between New York City and Montreal . The highway begins in the Bronx borough of New York City , just north of the Triborough Bridge . From there , the route runs northward through the Hudson Valley , the Capital District , and the easternmost part of the North Country to the Canadian border in the Town of Champlain . At its north end , I @-@ 87 continues into Quebec as Autoroute 15 ( A @-@ 15 ) . I @-@ 87 connects with several regionally important roads : I @-@ 95 in New York City , New York State Route 17 ( NY 17 ; future I @-@ 86 ) near Harriman , I @-@ 84 near Newburgh , and I @-@ 90 in Albany . The route is the longest intrastate Interstate Highway in the Interstate Highway System . 
