Crowley's Ridge Parkway is a 212.0-mile-long (341.2 km) National Scenic Byway in northeast Arkansas and the Missouri Bootheel along Crowley's Ridge in the United States. Motorists can access the parkway from US Route 49 (US 49) at its southern terminus near the Helena Bridge over the Mississippi River outside Helena-West Helena, Arkansas, or from Missouri Route 25 (Route 25) near Kennett, Missouri. The parkway runs along Crowley's Ridge, a unique geological formation, and also parts of the St. Francis National Forest, the Mississippi River and the Mississippi Alluvial Plain. Along the route are many National Register of Historic Places properties, Civil War battlefields, parks, and other archeological and culturally significant points. Crowley's Ridge Parkway is not a separately designated route, but a collection of United States highways, Arkansas state highways, Missouri state routes, Missouri supplemental routes, Arkansas state highway business routes, county roads, and city streets. The route also briefly overlaps the Great River Road in Arkansas. The parkway was designated as an Arkansas Scenic Byway in 1997 as a motor route which allowed the traveler to experience the Southern heritage of the area. The National Scenic Byway designation came the following year, with an extension into Missouri in 2000.