
Railway modelling or model railroading is a hobby in which rail transport systems are modelled at a reduced scale.

N scale is a popular model railway scale. Depending upon the manufacturer, the scale ranges from 1:148 to 1:160. Effectively the scale is 1:159, 9 mm to 1,435 mm, which is the width of standard gauge railway. However the scale may vary to simulate wide or narrow gauge rail. In all cases, the gauge is 9 mm or 0.354 in. The term N gauge refers to the track dimensions, but in the United Kingdom in particular British N gauge refers to a 1:148 scale with 1:160 track gauge modelling. The terms N scale and N gauge are often inaccurately used interchangeably, as scale is defined as ratio or proportion of the model, and gauge only as a distance between rails. The scale 1:148 defines the rail-to-rail gauge equal to 9 mm exactly, so when calculating the rail or track use 1:160 and for engines and car wheel base use 1:148.

The California State Railroad Museum is a museum in the California State Parks system that interprets the role of railroads in the West. It is located in Old Sacramento State Historic Park at 111 I Street, Sacramento, California.

The Magma Arizona Railroad was built by the Magma Copper Company and operated from 1915 to 1997.

A backyard railroad is a privately owned, outdoor railroad, most often in miniature, but large enough for one or several persons to ride on. The rail gauge can be anything from 2+1⁄2 in to 7+1⁄2 in or more. Smaller backyard or outdoor railroads that cannot be ridden are called garden railroads. Some backyard railroads use full-size rolling stock, such as the former 3 ft narrow gauge Grizzly Flats Railroad owned by railfan and Disney animator Ward Kimball.

The Colorado Railroad Museum is a non-profit railroad museum. The museum is located on 15 acres (6.1 ha) at a point where Clear Creek flows between North and South Table Mountains in Golden, Colorado.
William Jones (1884–1968), a seasoned veteran of the steam era who established the Wildcat Railroad in Los Gatos, California, was born the son of a teamster in the town of Ben Lomond, California.

McCormick Ranch refers to an area in Scottsdale, Arizona, which is one of the largest planned communities in Arizona.
The Toy Train Depot is a toy store and railway museum, featuring scale models of train locomotives and passenger and freight cars, in Alamogordo, New Mexico.

The Monticello Railway Museum is a non-profit railroad museum located in Monticello, Illinois, about 18 miles west of Champaign, IL. It is home to over 100 pieces of railroad equipment, including several restored diesel locomotives and cars.

The Museum of the American Railroad, formerly known as the Age of Steam Railroad Museum, is a railroad museum in Frisco, Texas. The museum has more than 70 pieces of steam, diesel, passenger, and freight railroad equipment sitting on 15 acres making it one of the largest historic rail collections in the US. Guests may walk through some of the equipment on guided tours.

The San Diego Model Railroad Museum is a model railroad exhibit in San Diego, California. At 27,000 sq. ft., it is one of the largest such indoor exhibits in North America and the world. The museum is located on the lower level of the Casa de Balboa Building on the Prado in Balboa Park.

The Texas Transportation Museum (TTM) is a transportation museum located in San Antonio, Texas.

The Grizzly Flats Railroad (GFRR) was a 3-foot narrow-gauge heritage railroad owned by Disney animator Ward Kimball at his home in San Gabriel, California. The railroad had 900 feet (274.3 m) of track, and was operated from 1942 to 2006. It was the first full-size backyard railroad in the United States.

The Los Angeles Live Steamers Railroad Museum (LALSRM) is a non-profit public-benefit corporation founded in 1956 by live steam enthusiasts for the purpose of educating the public about railroad history and lore, and to promote live steam and scale model railroad technology. The museum is located in Griffith Park in Los Angeles, California and is open from 11 a.m. to 3 p.m. every Sunday weather permitting. In 1956, all of the model locomotives were steam-powered, hence the name "Live Steamers". Over the years, gasoline-powered models of diesel locomotives and battery-electric locomotives and trolleys have also become popular. The museum operates a 7+1⁄2 in gauge miniature railway on which these locomotives pull trains that the public can ride.

The Adobe Mountain Desert Park a.k.a. "The Railroad Park" is a park complex that houses the Sahuaro Central Railroad Heritage preservation Society, Sahuaro Central Railroad Museum, Arizona Model Railroading Society, and the Maricopa Live Steamers. The approximately 160-acre Adobe Mountain Desert Railroad Park is located south of Pinnacle Peak Road on 43rd Avenue in the City of Glendale, Arizona.

The Southern California Railway Museum, formerly known as the Orange Empire Railway Museum, is a railroad museum in Perris, California, United States. It was founded in 1956 at Griffith Park in Los Angeles before moving to the former Pinacate Station as the "Orange Empire Trolley Museum" in 1958. It was renamed "Orange Empire Railway Museum" in 1975 after merging with a museum then known as the California Southern Railroad Museum, and adopted its current name in 2019. The museum also operates a heritage railroad on the museum grounds.

Named after the Norwegian explorer, the Roald Amundsen is a former Pullman Company private car; the last of seven Explorer-series cars built between 1927 and 1929 for the Pullman Company's pool of passenger cars. It was frequently used as the United States Presidential Rail Car, and was used for every president from Herbert Hoover through Dwight Eisenhower.