Yellowstone River
The New World district sits only about four miles from the Northeast entrance to Yellowstone National Park at the drainage divide between two creeks both of which eventually feed the Yellowstone River: Miller Creek, on the southwest side of Henderson mountain, flows to Soda Butte Creek which goes into Yellowstone National Park where it joins the Lamar River then the Yellowstone River; Fisher Creek, on the northeast side of Henderson mountain, flows into the Clark's Fork of the Yellowstone River which joins the Yellowstone River downstream and well northeast of Yellowstone National Park at Laurel, Montana.