Rocky Hollow is a long second-order tributary to Dunkard Creek in Greene County.
Rocky Hollow rises about 0.5 miles northwest of Poland Mines, Pennsylvania and then flows southeasterly to join Dunkard Creek about 2 miles west-southwest of Fieldsons Crossroads, Pennsylvania.
Rocky Hollow drains of area, receives about 42.9 in/year of precipitation, and is about 54.3% forested.