The mountains of southwestern Pennsylvania provide the setting for the most popular whitewater in America: the Youghiogheny River at Ohiopyle. People from all over the nation come to run the rapids, while others simply enjoy the natural beauty of Ohiopyle State Park. But this Appalachian river has many faces as it flows from its source among the scattered mountain farms of western Maryland to its confluence with the Monongahela in the industrial outskirts...