The Montour Trail is a multi-use rail trail that follows a sweeping arc through the suburbs of Washington and Allegheny Counties, southwest of Pittsburgh. It is also the longest suburban rail-trail in the United States. The 46-mile mainline is nearly complete, and extends from Coraopolis on the Ohio River to Clairton on the Monongahela River. The Montour Trail connects the nationally prominent Great Allegheny Passage, a trail route extending from Pittsburgh to Washington D.C. – with many suburban Pittsburgh municipalities, as well as the Pittsburgh International Airport. The trail’s soft, crushed limestone surface makes it ideal for multiple forms of non-motorized use, such as biking, walking, and cross-country skiing. There are also numerous trailheads along the trail. In addition to parking, many of these also provide restrooms and water fountains. Built primarily on former Montour and Pennsylvania Railroad rights-of-way, it provides an unusually flat pathway amidst southwestern Pennsylvania’s hilly topography. This scenic greenway provides picturesque natural landscapes, waterways and wetlands, views of historic railroad bridges and tunnels, as well as numerous fishing opportunities along the various waterways.