The Youghiogheny River ( yok-ə-GAY-nee), or the Yough ( YOK) for short, is a 134-mile-long (216 km) tributary of the Monongahela River in West Virginia, Maryland, and Pennsylvania. It drains an area on the west side of the Allegheny Mountains northward into Pennsylvania, providing a small watershed in extreme western Maryland into the tributaries of the Mississippi River. Youghiogheny is a Lenape word meaning "a stream flowing in a contrary direction".
Click any point for details. Sections without stored geometry are drawn as straight put-in → take-out lines — actual courses follow the river.