Question: The Fernley & Lassen was constructed in 1912-1914 between Fernley, Nevada and Westwood, California, near Susanville, it was constructed to connect the Red River Lumber Company's facilities in Westwood with the Southern Pacific's main line running through Fernley, a city in which county in Nevada, United States, east of the Reno–Sparks metropolitan area?

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Minarets and Western Railway: The Minarets and Western Railway was a Class II common carrier that operated in Fresno County, California, from 1921 - 1933.  The railway was owned by the Sugar Pine Lumber Company and was built the same year the lumber company was incorporated so that it could haul timber from the forest near Minarets (northeast of Friant) to its sawmill at Pinedale (near Fresno).  The southern portion of the line was operated with joint trackage rights with Southern Pacific.

Santa Ana and Newport Railway: The Santa Ana Rail Road was formed by the Newport Wharf and Lumber Company on 23 August 1889 to build a railway connection from the lumber company wharf in Newport Beach, California to the national rail network in Santa Ana, California.  The 11.71 mile rail line was built in 1890 and operated as a freight line until passenger service was began in 1891.  Southern Pacific formed the Santa Ana and Newport Railway (SA&N) on 7 November 1892 to acquire the line from the lumber company on 11 February 1893.  On 28 March 1899 SA&N purchased the unbuilt Santa and Westminster Railway incorporated on 5 August 1890, and built a station on 2nd Street in Santa Ana to hold the franchise for an 9 mile line connecting Santa Ana and Westminster, California.  Construction of a 10.76 mile branch from Newport to Smeltzer began in 1899, but was incomplete when Southern Pacific merged the SA&N on 23 November 1899, and did not begin operation until 1 January 1900.

Fernley and Lassen Railway Depot: The Fernley and Lassen Railway Depot, 675 E. Main St. in Fernley, Nevada was built in 1914.  Also known as Southern Pacific Railroad Depot, it was listed on the National Register of Historic Places in 2005.

Herlong, California: Herlong is a census-designated place in Lassen County, California.  Herlong is located at the extreme eastern edge of the Sierra Nevada Mountain Range in the southeastern region of Honey Lake Valley, 8 mi north of Doyle, at an elevation of 4114 ft .  Herlong is located in southern Lassen County near the southeast edge of Honey Lake, about 70 mi north of Reno, Nevada, and about 45 mi south of Susanville, the county seat.  The community is accessible to U.S. Route 395 via Lassen County Route A25 or Lassen County Route A26.

Butte County Railroad: The Butte County Railroad was a 31.5 mi class II railroad that ran from a connection with the Southern Pacific Railroad at Chico, California to the Diamond Match Company lumber mill at Stirling City.  The railroad operated from 1903-1915 and then became the Southern Pacific's Stirling City Branch.  From 1915 until abandonment in the 1970s the line was operated as the Southern Pacific's Stirling City Branch.  The Chico and Northern Railroad was a non-operating subsidiary holding company of the Southern Pacific Railroad that was created to acquire a 32.31 mile line from Chico - Stirling City from the Butte County Railroad.  Upon acquiring the line, Chico & Northern immediately leased the line back to the Butte County Railroad.  The Chico & Northern was dissolved into Southern Pacific in 1912 and never operated any of the line.

Fernley, Nevada: Fernley is a city in Lyon County, Nevada, United States, east of the Reno–Sparks metropolitan area.  The city incorporated in 2001; prior to that it was a census-designated place (CDP).  The population of the city was 19,368 at the 2010 census.  Fernley is home to the Reno-Fernley Raceway, and is the former home of Amazon.com which has relocated to Reno.

Interstate 80 in Nevada: Interstate 80 (I-80) traverses the northern portion of the U.S. state of Nevada.  The freeway serves the Reno–Sparks metropolitan area and passes through the towns of Fernley, Lovelock, Winnemucca, Battle Mountain, Carlin, Elko, Wells and West Wendover on its way through the state.

Westwood, California: Westwood is a census-designated place (CDP) in Lassen County, California, United States.  Westwood is located 20 miles (32 km) west-southwest of Susanville, at an elevation of 5,128 feet (1,563 m).  The population was 1,647 at the 2010 census, down from 1,998 at the 2000 census.  Westwood is the hometown of mythical logger Paul Bunyan.

Fernley and Lassen Railway: The Fernley & Lassen was constructed in 1912-1914 between Fernley, Nevada and Westwood, California, near Susanville, a distance of approximately 112 mi .  The railroad was constructed to connect the Red River Lumber Company's facilities in Westwood with the Southern Pacific's main line running through Fernley.  After the railroad's construction, it was heavily used by other nearby lumber companies; the Fruit Growers Supply Company maintained the longest-lived railroad connection with the Fernley & Lassen, with an active connection present between 1920-1953.  Due to the Great Depression, which significantly lowered freight volume, and the completion of Western Pacific's competing branch to Westwood, however, the Fernley & Lassen's days were numbered.  By 1934, passenger traffic service had been discontinued, with local rail freighting following it in 1956.  In 1978, the Interstate Commerce Commission approved the Southern Pacific's petition for removal.

California State Route 14: State Route 14 (SR 14) is a north–south state highway in the U.S. state of California, largely in the Mojave Desert.  The southern portion of the highway is signed as the Antelope Valley Freeway.  The route connects Interstate 5, or Golden State Freeway, on the border of the city of Santa Clarita to the north and the Los Angeles neighborhoods of Granada Hills and Sylmar to the south, with U.S. Route 395 near Inyokern.  Legislatively, the route extends south of I-5 to State Route 1 in the Pacific Palisades area of Los Angeles, however the portion south of the junction with I-5 has not been constructed.  The southern part of the constructed route is a busy commuter freeway serving and connecting the cities of Santa Clarita, Palmdale, and Lancaster with the rest of the Greater Los Angeles area.  The northern portion, from Vincent (south of Palmdale) to Route 395, is legislatively named the Aerospace Highway, as the highway serves Edwards Air Force Base, once one of the primary landing strips for NASA's Space Shuttle.  This section is rural, following the line between the hot Mojave desert and the forming Sierra Nevada mountain range.  Most of Route 14 is loosely paralleled by a main line of the Southern Pacific Railroad, used for the Antelope Valley Line of the Metrolink commuter rail system as well as a connection between Los Angeles and the Central Valley via Tehachapi Pass.

Supporting paragraphs: Fernley and Lassen Railway Fernley, Nevada
Answer: Lyon County