AtAtrail.org provides information about a hiking trail that runs through DC
About AtAtrail.org
When completed, the 150-mile Great Allegheny Passage will connect with the 184.5-mile C&O Canal Towpath at Cumberland, Maryland to create a 334.5-mile traffic and motorized vehicle-free route between Pittsburgh and Washington, DC. The Montour Branch will, when completed, connect McKeesport to the Pittsburgh International Airport and Coraopolis.
