The Long Wharf in Santa Monica, also known as Port Los Angeles or the Mile Long Pier, was an extensive pier wharf constructed by the Southern Pacific Railroad Company in Santa Monica Bay from 1892 to 1894. When it opened in 1894, it was the longest wharf in the world, measuring approximately 4,700 feet (1,400 m). It served as a cargo and passenger port until 1913, and in 1919 removal of the wharf started. The wharf, the 1,000 foot (300 m) tip of the pier, was removed by 1920. The remaining 3,600 feet (1,100 m) of pier was used as a run down fishing pier until 1933, when the remainder of the pier was removed. One of the major imports to the wharf was lumber from Northern ports, to help in the construction boom in Southern California. Southern Pacific Railroad and the street cars of the Los Angeles Pacific Railroad served the wharf. Los Angeles Pacific Railroad ran passenger trams to the wharf and from midnight to sunrise ran cargo cars.

The Los Angeles Pacific Railroad (1896−1911) (LAP) was an electric public transit and freight railway system in Los Angeles County, California. At its peak it had 230 miles (370 km) of track extending from Downtown Los Angeles to the Westside, Santa Monica, and the South Bay towns along Santa Monica Bay.