Area 51 the base extends further east. After leaving the restricted area, Groom Lake Road descends eastward to the floor of the Tikaboo Valley, passing the dirt-road entrances to several small ranches, before converging with State Route 375, the "Extraterrestrial Highway", south of Rachel. Area 51 shares a border with the Yucca Flat region of the Nevada Test Site, the location of 739 of the 928 nuclear tests conducted by the United States Department of Energy at NTS. The Yucca Mountain nuclear waste repository is southwest of Groom Lake. Groom Lake is a salt flat in Nevada used for runways of the
New York State Route 51 north from West Winfield to Utica. At the time, this was the only substantial segment of what is now NY 51 to have a route number even though all of modern NY 51 south of Ilion was state-maintained. In the 1930 renumbering of state highways in New York, most of NY 44 became part of NY 8. The section from West Burlington to West Winfield, however, became part of the new NY 51, which utilized all of its modern routing from Mount Upton to Ilion upon assignment. It was extended across the Mohawk River to NY 5 in North Ilion