New York State Route 21 is a north-south highway located in the western part of New York. It stretches approximately 90 miles, connecting the city of Canandaigua in the south to the town of Lyndonville in the north. The route passes through several towns and offers access to various recreational areas, including Letchworth State Park. The highway serves as an important local thoroughfare, facilitating travel between communities and providing access to regional attractions. It intersects with several other major roads, enhancing connectivity within the region. New York State Route 21 is primarily a two-lane road, making it suitable for both local and through traffic.