Youghiogheny River
（重定向自Yough）
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![](/Images/godic/202502/21/Monon_YoughioghenyRiver1138.png")
![1751 map depicting the](/Images/godic/202502/21/Kitfry-1-1138.jpg")
![Map of the Pittsburgh Tri-State with green counties in the metropolitan area and yellow counties in the combined area.](/Images/godic/202502/21/2013_Pittsburgh_Metro_Area_SMALL1138.PNG")
The Youghiogheny River /jɒkəˈɡeɪni/, or the Yough /ˈjɒk/ for short, is a 134-mile-long (216 km) tributary of the Monongahela River in the U.S. states of 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 an Algonquin word meaning "a stream flowing in a contrary direction".