New York State Route 186A is a short state highway located in Suffolk County, New York. It runs for approximately 1.5 miles, connecting New York State Route 186 to New York State Route 27A. The route primarily serves local traffic and provides access to nearby residential areas. The highway is maintained by the New York State Department of Transportation and features a mix of urban and suburban landscapes. It is an important link for residents and visitors traveling within the region, facilitating easy movement between major roads and local destinations.