New York State Route 280 (NY 280) is an long north–south state highway in rural Cattaraugus County, New York, in the United States. The southern terminus of the route is at the Pennsylvania state line in South Valley, where it becomes Pennsylvania Route 346 (PA 346). The northern terminus is at exit 18 on the Southern Tier Expressway (Interstate 86 or I-86 and NY 17) in Coldspring, west of Salamanca. NY 280 follows both the eastern edge of the Allegheny Reservoir and the western boundary of Allegany State Park for its entire length. When NY 280 was originally assigned as part of the 1930 renumbering of state highways in New York, it was little more than a short spur route off of NY 17 that followed the Allegheny River south to the hamlet of Quaker Bridge. In 1965, the Kinzua Dam was completed, leading to the creation of the Allegheny Reservoir and the inundation of much of NY 280. As a result, the route was shifted onto a new alignment that was constructed along the eastern edge of the reservoir. Route description At the Pennsylvania state line in South Valley, PA 346 exits the Allegheny National Forest and becomes NY 280 upon entering New York. The route heads north along the eastern edge of the Allegheny Reservoir as East Bank Perimeter Road, clipping the southwestern corner of Allegany State Park prior to entering the Allegany Indian Reservation. NY 280 passes in and out of the park once more before turning to the east toward Quaker Lake as it enters the town of Coldspring. At Quaker Lake, NY 280 penetrates the park boundary once more and intersects Allegany State Park Route 3 (ASP Route 3) at the Quaker Run entrance. Here, NY 280 turns north, traversing a small waterway separating Quaker Lake from the reservoir before reentering the Allegany Indian Reservation limits. Between ASP Route 3 and exit 18 of the Southern Tier Expressway (I-86 and NY 17), NY 280 continues to straddle both the eastern extent of the Allegheny Reservoir and the western perimeter of Allegany State Park before terminating at a diamond interchange with the Southern Tier Expressway. The West Bank Perimeter Road (unsigned NY 950A), which parallels NY 280 from the Pennsylvania line northward on the western bank of the reservoir, meets the expressway at exit 17 to the west. History Families living in the hamlet of Cold