The Three Rivers Heritage Trail is an urban rail trail paralleling the riverbanks in Pittsburgh, Pennsylvania and Allegheny County for about 33 miles (53 km), often on both sides of the rivers, and offering views of the city. The trail is promoted and maintained in part by the 'Friends of the Riverfront'. Their stated mission is to increase awareness and engagement with the region's rivers and riverfronts through activities and stewardship, and to extend the water and land trails on the major rivers within Allegheny County.