High Quality Content by WIKIPEDIA articles! New York State Route 101 (NY 101) is a 3.58-mile (5.76 km) long state highway in northwestern Nassau County, New York, United States. It runs north–south as Port Washington Boulevard from NY 25A in Flower Hill, west of Roslyn and north of Manhasset, to Astor Lane in Sands Point. It continues south along Searingtown Road to Shelter Rock Road (County Route 8 or CR 8) and north on Middle Neck Road to a dead end at Long Island Sound as the unsigned County Route 101.