Death Valley National Park class 2 or "average dark sky" sites. Death Valley National Park Death Valley National Park is an American national park that straddles the California—Nevada border, east of the Sierra Nevada. The park occupies an interface zone between the arid Great Basin and Mojave deserts, protecting the northwest corner of the Mojave Desert and its diverse environment of salt-flats, sand dunes, badlands, valleys, canyons, and mountains. Death Valley is the largest national park in the lower 48 states, and the hottest, driest and lowest of all the national parks in the United States. The second-lowest point in the Western Hemisphere is
Death Valley October 1992. On average, 192 days per year in Death Valley have temperatures that reach 90 °F or more. Before being moved to Furnace Creek, the weather station at Greenland Ranch averaged 194.4 days annually where temperatures reached 90 °F or more. The lowest temperature recorded at Greenland Ranch was in January 1913. The period from July 17–19, 1959, was the longest string of consecutive days where nighttime low temperatures did not drop below . The highest overnight or low temperature recorded in Death Valley is , recorded on July 5, 1918, and the current world record for highest overnight