rolling green run begins in a small valley in monroe township. it flows west for a few tenths of a mile and enters a larger valley. here, the stream turns south-southeast for several tenths of a mile before turning southeast. several tenths of a mile further downstream, it leaves the valley, receives two unnamed tributaries (one from the left and one from the right), and enters the census-designated place of hummels wharf. in hummels wharf, the stream turns south-southeast for more than a mile before crossing us route 11/us route 15 and turning northeast. it flows parallel to the susquehanna river for several tenths of a mile before reaching its confluence with the susquehanna river.