Adventure Cycling Association's Atlantic Coast Bicycle Route is a 2,615-mile-long (4,208 km) bicycle touring route traversing the East Coast of the United States. The route has two connecting segments, extending nearly the entire length of the nation's eastern margin. The northern section of the route features historic New England coastal villages and towns, rural countrysides, and Amish farmlands. The route's southern section begins after the Mason–Dixon Line (the boundary between Pennsylvania and Maryland) and is notable for the Civil War battlefields in Fredericksburg, Virginia, and the city of Richmond, Virginia. The northern section of the route can be ridden between late spring and late fall, and the southern section can be ridden year-round.