Hobbs Run is a long first-order tributary to Dunkard Creek in Greene County. This is the only stream of this name in the United States.
Hobbs Run rises about 2 miles south of Mount Morris, Pennsylvania and then flows southeasterly to join Dunkard Creek at Mount Morris, Pennsylvania.
Hobbs Run drains of area, receives about 43.1 in/year of precipitation, and is about 84% forested.