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
Gibraltar Rock State Natural Area Gibraltar Rock State Natural Area Gibraltar Rock State Natural Area is a natural area in southern Wisconsin, United States, which is in size, and is located along the Ice Age Trail. Located in Columbia County, Wisconsin, Gibraltar Rock State Natural Area is in size. The Wisconsin River Valley and Lake Wisconsin are located within view of the higher-elevation points in the natural area. The Gibraltar Rock State Natural Area is located along the Ice Age Trail, which is a thousand miles long. It is located from the intersection of Highway 113 and County Highway V in the town of West