The Denver & Rio Grande Western Railroad, often shortened to Rio Grande, D&RG or D&RGW, formerly the Denver & Rio Grande Railroad, was an American Class I railroad company. The railroad started as a 3 ft narrow-gauge line running south from Denver, Colorado, in 1870. It served mainly as a transcontinental bridge line between Denver, and Salt Lake City, Utah. The Rio Grande was also a major origin of coal and mineral traffic.
The Denver, South Park, and Pacific Railroad was a historic 3 ft 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, hence its popular name "The South Park Line." 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 a new corporate name as 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 4 ft 8+1⁄2 instandard gauge. 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 miles (539 km) of narrow gauge line, making it the largest narrow gauge railroad in the state of Colorado.
The Sumpter Valley Railway, or Sumpter Valley Railroad, is a 3 ft narrow gauge heritage railroad located in Baker County, in the U.S. state of Oregon. Built on a right-of-way used by the original railway of the same name, it carries excursion trains on a roughly 5-mile (8.0 km) route between McEwen and Sumpter. The railroad has two steam locomotives and several other pieces of rolling stock. Passenger excursion trains operate on weekends and holidays from Memorial Day through the end of September.
The Northwestern Pacific Railroad is a regional shortline railroad utilizing a 62 mi (100 km) stretch of the 271 mile mainline between Schellville and Windsor with freight and Sonoma–Marin Area Rail Transit (SMART) commuter trains. Formerly, it was a regional railroad primarily used for logging that served the entire North Coast of California, with a main line running 271 miles (436 km) from Schellville to Eureka, along with an additional portion of the line running from the Ignacio Wye to the edge of San Rafael. The "Southern End" of the line, including Schellville to Willits and from Ignacio to San Rafael is owned by SMART, while the "Northern End" was formally owned and managed by the now-dissolved North Coast Railroad Authority but is now saved for use in California's 2018 Great Redwood Trail Act, which repurposes the unused railroad right-of-way from Eureka to Willits for future use as the Great Redwood Trail.
The South Pacific Coast Railroad (SPC) was a 3 ft narrow gauge steam railroad running between Santa Cruz, California and Alameda, with a ferry connection in Alameda to San Francisco. The railroad was created as the Santa Clara Valley Railroad, founded by local strawberry growers as a way to get their crops to market in San Francisco and provide an alternative to the Southern Pacific Railroad. In 1876, James Graham Fair, a Comstock Lode silver baron, bought the line and extended it into the Santa Cruz Mountains to capture the significant lumber traffic coming out of the redwood forests. The narrow-gauge line was originally laid with 52-pound-per-yard (26 kg/m) rail on 8-foot (2.44 m) redwood ties; and was later acquired by the Southern Pacific and converted to 4 ft 8+1⁄2 instandard gauge.
The Sandy River Railroad was a 2 ft narrow gauge railway built to serve the towns of Strong and Phillips in the Sandy River valley upstream of Farmington. The Sandy River Railroad was the first narrow gauge common carrier railroad built in the State of Maine.
The Phillips and Rangeley Railroad was a 2 ft narrow gauge common carrier railroad in the State of Maine.
Standard gauge was favored for railway construction in the United States, although a fairly large narrow-gauge system developed in the Rocky Mountains of Colorado and Utah. Isolated narrow-gauge lines were built in many areas to minimize construction costs for industrial transport or resort access, and some of these lines offered common carrier service. Outside Colorado, these isolated lines evolved into regional narrow-gauge systems in Maine, New York, Pennsylvania, Ohio, Iowa, Hawaii, and Alaska.
Originally, various track gauges were used in the United States. Some railways, primarily in the northeast, used standard gauge of 4 ft 8+1⁄2 in ; others used gauges ranging from 2 ft to 6 ft. As a general rule, southern railroads were built to one or another broad gauge, mostly 5 ft, while northern railroads that were not standard-gauge tended to be narrow-gauge. The Pacific Railroad Acts of 1863 specified standard gauge.
The Alamosa–Durango line or San Juan extension was a railroad line built by the Denver and Rio Grande Western Railroad, following the border between the U.S. states of Colorado and New Mexico, in the Rocky Mountains. The line was originally built as a 3 ft narrow-gauge line between Alamosa, Colorado, and Durango, Colorado. Portions of the route survive to this day: the now standard-gauged segment from Alamosa to Antonito, Colorado, and a narrow-gauge portion from Antonito to Chama, New Mexico.
