Yellowstone back country camp site 9F1 is a secluded camp site along Falls River in the SW corner of Yellowstone NP.  The camp site is 1 tenth of a mile of the main trail giving you plenty of privacy.  Their is plenty of flat ground for several tents right along the river.  We were surprised by how few mosquitos their was for how much water was around.  The area has a pole for hanging your food bag and a rock campfire ring next to the tent area.  The biggest draw back was the lack of a decent log or rock to sit on while in camp.   Easy access to the Falls River for filtering water.