![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/9/9d/Monongahela_River_-_Southsidefromwash.jpg/640px-Monongahela_River_-_Southsidefromwash.jpg&w=640&q=50)
Monongahela River
river in Pennsylvania and West Virginia, United States / From Wikipedia, the free encyclopedia
The Monongahela River (/məˌnɒŋɡəˈhiːlə/ mə-NONG-gə-HEE-lə, /-ˈheɪ-/ HAY-)[1] — often referred to locally as the Mon (/mɒn/) — is a 130-mile-long (210 km)[2] river on the Allegheny Plateau in north-central West Virginia and southwestern Pennsylvania, which flows from south to north. The Monongahela joins the Allegheny River to form the Ohio River at Pittsburgh.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9d/Monongahela_River_-_Southsidefromwash.jpg/640px-Monongahela_River_-_Southsidefromwash.jpg)