Question: The Death Valley Railroad  was a narrow gauge railroad located just east of Death Valley National Park, in what state? 

Context paragraphs:
Death Valley Suite: The Death Valley Suite is a short symphonic suite written by Ferde Grofé in 1949, depicting the westward travels of pioneers through the 'harsh lands' of Death Valley in California.  Grofe was commissioned by the Death Valley 49ers, a non profit organization devoted to preserving pioneering and mining history of the Death Valley region (consisting of Death Valley National Park and surrounding area).  The composition and music was part of a pageant celebrating the 100th anniversary of the 49ers who came by way of Death Valley in search of gold and other riches and celebration of the California state centennial (1850-1950).

Nevada County Narrow Gauge Railroad: The Nevada County Narrow Gauge Railroad (NCNGRR) (nickname: "Never Come, Never Go") was located in Northern California's Nevada County and Placer County, where it connected with the Central Pacific Railroad.  The Nevada County Narrow Gauge Railroad Company incorporated on April 4, 1874, and was headquartered in Grass Valley, California.  After two years of construction, passenger and commercial rail services began in 1876 and continued until 1943.  The 22.53 mi line ran from Colfax, north through Grass Valley to Nevada City.  At one time, the railroad was notable for having the highest railroad bridge in California, the Bear River Bridge, built in 1908.

Eagles Mere Railroad: The Eagles Mere Railroad was a narrow gauge railroad in Sullivan County, Pennsylvania, built in 1892 to connect the resort of Eagles Mere with the standard gauge Williamsport and North Branch Railroad at Sonestown, 8 mi away by rail.  It was leased to the connecting Williamsport & North Branch in 1901, which continued to operate it as a narrow gauge, and extended it in 1902–3 to Eagles Mere Park and a connection with the narrow gauge Susquehanna and Eagles Mere Railroad, a logging railroad.  The line went through a receivership and reorganization in 1911–2, and a second in 1920, due to increasing competition with automobiles for traffic to Eagles Mere.  It was reorganized again in 1922 as the Eagles Mere Railway, operating independently of the W&NB, but ended passenger service in 1923 and freight service in 1927.  It was abandoned in 1928.

Southern Pacific (narrow gauge): The Southern Pacific narrow gauge is the informal name given to a network of narrow gauge railroad lines operated by the Southern Pacific Railroad (SP) in western Nevada and eastern California.  The SP narrow gauge system operated on the tracks of the former Carson and Colorado Railway which was purchased by SP in 1900.  The line was originally built by the Virginia and Truckee Railroad.  It was later purchased by the Southern Pacific, the line made enough profit to repay the purchase price within only one month.  However, in later years the line was not as profitable, although it was enough to justify dieselizing the line, one of the few such cases in the United States.

Death Valley Railroad: The Death Valley Railroad (DVRR) was a narrow gauge railroad that operated in California's Death Valley to carry borax with the route running from Ryan, California to the mines at Ryan C., located just east of Death Valley National Park, to Death Valley Junction, a distance of approximately 20 miles.

Death Valley National Park: Death Valley National Park is a national park in the United States.  Straddling the border of California and Nevada, located east of the Sierra Nevada, it occupies an interface zone between the arid Great Basin and Mojave deserts in the United States.  The park protects the northwest corner of the Mojave Desert and contains a diverse desert environment of salt-flats, sand dunes, badlands, valleys, canyons, and mountains.  It is the largest national park in the lower 48 states and has been declared an International Biosphere Reserve.  Approximately 91% of the park is a designated wilderness area.  It is the hottest, driest and lowest of the national parks in the United States.  The second-lowest point in the Western Hemisphere is in Badwater Basin, which is 282 ft below sea level.  The park is home to many species of plants and animals that have adapted to this harsh desert environment.  Some examples include creosote bush, bighorn sheep, coyote, and the Death Valley pupfish, a survivor from much wetter times.

Newport and Shermans Valley Railroad: The Newport and Shermans Valley Railroad was a nineteenth-century, narrow gauge railroad in Pennsylvania.  It ran from Newport, Pennsylvania to New Germantown, Pennsylvania.  It carried lumber, and transferred it to the Pennsylvania Railroad at Newport.  The right of way was extended to an uncompleted tunnel through Conococheague Mountain, started in an attempt to connect with the Path Valley Railroad.  This right of way was later used by the Perry Lumber Railroad.

Tanana Valley Railroad: The Tanana Valley Railroad (TVRR) was a narrow gauge railroad that operated in the Tanana Valley of Alaska from 1905 to about 1917.  A portion of the railroad later became part of the Alaska Railroad.

Kings Island &amp; Miami Valley Railroad: The Kings Island & Miami Valley Railroad is a narrow gauge passenger railroad located at the Kings Island Amusement Park in Mason, Ohio.  The line is a 5,282-foot (1,610 m) loop.  The line has two stations: the Losantiville station (the main station) also commonly referred to as "Rivertown Station" and a station at Soak City.  It is a part of the rides department, and has a thrill rating of "1 - Low Thrill Ride".  The entire journey lasts between 9 and 15 minutes, depending on station stops and number of trains in operation.  The Kings Island & Miami Valley Railroad is one of the oldest and consistently popular attractions at Kings Island.  It is currently the second most visited ride of all time at the park with over 50 million rides given.

Denver, South Park and Pacific Railroad: The Denver, South Park, and Pacific Railroad (later called the Denver, Leadville and Gunnison Railway) was a historic narrow gauge railroad that operated in Colorado in the western United States in the late 19th century.  The railroad opened up the first rail routes to a large section of the central Colorado mining district in the decades of the mineral boom.  The railroad took its name from the fact that its main line from Denver ascended the Platte Canyon and traversed South Park.  Founded in 1872 by Colorado Governor John Evans, the company was purchased by the Union Pacific Railway in 1880, though it continued to be operated independently.  The line went bankrupt in 1889 and was reorganized under the new moniker the Denver, Leadville and Gunnison Railway.  When the Union Pacific went bankrupt in 1893, the DL&G lines went into receivership and were eventually sold to the Colorado and Southern Railway.  In the first half of the 20th century, nearly all the company's original lines were dismantled or converted into .  The last train to run the old DSP&P tracks was from Como, Colorado on April 11, 1937.  A section of the standard gauge line between Leadville and Climax is still operated as a passenger excursion railroad called the Leadville, Colorado and Southern Railroad.  At its peak the Denver, South Park and Pacific Railroad had 335 mi of narrow gauge line, making it the largest narrow gauge railroad in the state of Colorado.

Supporting paragraphs: Death Valley Railroad Death Valley National Park
Answer: California