High Quality Content by WIKIPEDIA articles! Yucca Mountain is a mountain in Nevada, near its border with California, approximately 100 miles (160 km) northwest of Las Vegas. The highest peak, named Chocolate Mountain, rises to 6,707 feet (2,044 m). Located in the Great Basin, Yucca Mountain is east of Amargosa Desert, south of the Nevada Test and Training Range and in the Nevada Test Site. It was the site for the Yucca Mountain nuclear waste repository before that plan was scrapped in 2010.