Narigan Run is a long 1st order tributary to Buffalo Creek in Washington County, Pennsylvania. This is the only stream of this name in the United States.
Narigan Run rises about 2 miles east-northeast of Frogtown, Washington County, Pennsylvania, in Washington County and then flows generally south to join Buffalo Creek about 1.5 miles east of Dunsfort.
Narigan Run drains of area, receives about 40.0 in/year of precipitation, has a wetness index of 300.67, and is about 71% forested.