New York State Route 431 (NY 431) is a state highway in Essex County, New York, in the United States. The highway, also known as the Whiteface Mountain Veterans Memorial Highway, begins at an intersection with NY 86 in Wilmington and climbs Whiteface Mountain in the Adirondacks. The New York State Department of Environmental Conservation maintains the highway, which is 7.96 miles (12.81 km) long.

New York State Route 86 (NY 86) is a 39.11-mile (62.94 km) long state highway located within Adirondack Park in northern New York, in the United States, linking Franklin County to Essex County. The western terminus of the route is at NY 30 in the hamlet of Paul Smiths. The eastern terminus is at NY 9N in Jay. Although largely a two-lane road, NY 86 is one of only two east–west highways in the High Peaks area of the Adirondack Park, providing a major link between hamlets and tourist destinations.