Connell RunConnell Run is a long 2nd order tributary to the Youghiogheny River in Fayette County, Pennsylvania. This is the only stream of this name in the United States.CourseConnell Run rises about 1.5 miles west-southwest of Pleasant Hill, Pennsylvania, and then flows west to join the Youghiogheny River at Connellsville.WatershedConnell Run drains of area, receives about 45.5 in/year of precipitation, has a wetness index of 339.82, and is about 70% forested.Natural historyConnell Run is the location of Connell Run BDA. The slopes on Connell Run provide habitat for a plant of special concern.