Death Valley Earth at 134 °F (56.7 °C) on July 10, 1913, as well as the highest recorded natural ground surface temperature on Earth at 201 °F (93.9 °C) on July 15, 1972. Located near the border of California and Nevada, in the Great Basin, east of the Sierra Nevada mountains, Death Valley constitutes much of Death Valley National Park and is the principal feature of the Mojave and Colorado Deserts Biosphere Reserve. It is located mostly in Inyo County, California. It runs from north to south between the Amargosa Range on the east and the Panamint Range on the west; the
Death Valley Railroad train ran per day bringing food and water to the workers at the Ryan mine, and bought ore back late in the afternoon. After better deposits of borax were discovered at Boron, the Death Valley Railroad tried to resort to tourist operations by bringing in a Brill railcar to transport tourists to the old mines. Due to a lack of profit from tourists and freight trains and the closure of the mines, the railroad closed in 1931. Much of the railroad ran parallel to what is today State Route 190. After this railroad ceased operations, the United States Potash Company