San Pedro, Los Angeles and Salt Lake Railroad (1901-1916)
The San Pedro, Los Angeles and Salt Lake Railroad (SPLA&SL) was built between 1901 and 1905 as a direct rail connection linking Salt Lake City with Los Angeles via southern Nevada and the eastern Mojave Desert. Promoted by Senator William A. Clark, the line was designed to move minerals, agricultural goods, and passengers between the interior West and Pacific Coast ports at San Pedro and Los Angeles.Construction began from both ends, pushing across difficult desert terrain, mountain passes, and water-scarce basins. The route followed a practical corridor through Las Vegas Valley, Jean, and Roach Lake, establishing a durable transportation alignment across southern Nevada. Las Vegas emerged as a key division point, anchored by water resources essential for steam operations.
The line was completed in 1905, forming a continuous trans-desert railroad. Almost immediately, it reshaped regional settlement patterns. Towns such as Las Vegas expanded rapidly, while smaller sidings and service points appeared along the route to support railroad operations.
From the outset, the railroad was tied to Union Pacific interests through agreements with E.H. Harriman. This joint control stabilized financing and positioned the line within a larger western rail system.
Los Angeles and Salt Lake Railroad (1916-1936)
In 1916, the SPLA&SL was reorganized and renamed the Los Angeles and Salt Lake Railroad (LA&SL), commonly known as the Salt Lake Route. Under Union Pacific influence, the line was upgraded with improved track, signaling, and expanded facilities to handle increasing freight and passenger traffic.During the 1920s, the railroad strengthened its role as a primary corridor linking Utah, Nevada, and Southern California. It carried minerals, agricultural products, and commercial goods while continuing to support the growth of Las Vegas and other desert communities.
The Great Depression brought reduced traffic and financial pressure, leading to operational adjustments and cost reductions. Despite these challenges, the corridor remained viable due to its strategic importance.
In 1936, the LA&SL was formally absorbed into the Union Pacific Railroad, ending its separate corporate identity but preserving the route as a major trans-desert rail spine.
Union Pacific
From 1936 onward, Union Pacific entered a more modern phase of its history, shifting from the early era of railroad building and financial instability into one of streamlined passenger service, large-scale freight movement, and growing operational efficiency. By this time the railroad was already a major western system, and over the following decades it strengthened its role as a principal transportation artery across the American West. Through war, dieselization, deregulation, and later mergers, Union Pacific evolved from a historic transcontinental railroad into one of the dominant freight carriers in the United States. In the Mojave region, its importance lay in sustaining the desert's major rail corridors, linking gateway points such as Needles, Barstow, and the approaches to Southern California within a larger continental network.
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Railroad History in the Mojave Preserve
A more moderately graded route was located in 1868 by General William J. Palmer, working for the Union Pacific Railway, Eastern Division. [40] That railroad ...
The Salt Lake Route
The first concrete evidence of Union Pacific intentions consisted of the Union Pacific interests pushing construction of a subsidiary Utah Southern southwest from ...
Kelso Depot
Kelso Depot seems like a quiet anomaly in the middle of the desert—but for the Union Pacific Railroad, it was a thriving necessity. Since its inception in 1862, the ...
Romantic Heritage of the Mojave River Valley
Strategically located on Highway 66 and served by the Santa Fe and Union Pacific, it is obvious that Daggett is enjoying a surging rebirth, all the more ...
Boron and Copper Discoveries
Immediately Smith's Pacific Coast Borax Company bought up the property. In 1905 the Los Angeles and Salt Lake Railroad (later the Union Pacific) was ...
Kelso, CA - Mojave Preserve
Kelso was a base of operations for the Los Angeles and Salt Lake Railroad (now part of the Union Pacific). Here, trains were watered and "helper" locomotives ...
Romantic Heritage of the Mojave River Valley
Around 1922, the Salt Lake line was bought by the Union Pacific, which established its main division point in the Mojave River Valley at Yermo. A new form of ...
Nipton, California
The name was changed to Nipton when the SP, LA & SL merged with the Union Pacific about 1910. For many years the depot served mainly as a cattle-loading ...
Desert Mining History - San Bernardino County
A new era of opportunity was ushered in with the January, 1905 completion of the San Pedro, Los Angeles and Salt Lake Railroad, (now the Union Pacific).
Kelso Depot
Writing of the need for a new station in Yermo, California, in a location only slightly less remote than Kelso, Carl R. Gray, President of the Union Pacific notified ...
Daggett Garage, Route 66, Daggett, California
That rusty sheet metal-built building located close by to the Stone Hotel and the Daggett Market, between Santa Fe Street and the Union Pacific railroad tracks, ...
The Road Builders: A History of the Victor Valley - Mojave Desert ...
All of the above have been abandoned or merged with either Santa Fe or Union Pacific. For the next 35 years, nearly everything that wasn't carried in a wagon ...
Romantic Heritage of the Mojave River Valley
Its strategic location can be likened to the hub of a wheel, the spokes radiating out representing the Santa Fe and Union Pacific railroad lines and that US ...
Mojave National Preserve
The old Union Pacific train depot at Kelso serves as a wonderful reminder the railroading hey-days of the 1920s. The collection of buildings at Soda Springs, ...
Timeline of History of the Mojave Desert
1906 Salt Lake City–Los Angeles railroad built through the desert (later became Union Pacific Railroad) 1916 Federal Aid Road Act leads to development of ...
Zion - People
State officials also negotiated with the Union Pacific Railroad to develop rail and automobile links and tourism facilities in southern Utah. By the summer of 1917, ...
Colorado River - Hoover Dam FAQ
... (3) construction of 22.7 miles of standard-gauge railroad from the Union Pacific main line in Las Vegas to Boulder City and an additional 10 miles from Boulder ...
Human Impacts on the Mojave National Preserve Area
The first rail lines through the Mojave Desert were completed in 1906; the Kelso Depot was built in 1924 by the Union Pacific Railroad to serve as a transfer point ...
Cima Ghost Town - Mojave National Preserve - California Mojave ...
Boiler water was needed for the locomotives pulling trains up the 18-mile, 2,000- foot grade to Cima. Later the line was sold to the Union Pacific Railroad, which .