At what Utah location was the first U.S. transcontinental railroad officially completed in 1869?

The first U.S. transcontinental railroad was officially completed at Promontory Summit in Utah on May 10, 1869.

The ceremony joined tracks built by the Union Pacific Railroad moving west from the Missouri River and the Central Pacific Railroad moving east from Sacramento. Leland Stanford, president of the Central Pacific, drove the ceremonial final spike at Promontory Summit. The event connected major portions of the eastern and western rail networks.

The line is often described as running from Omaha to Sacramento, although the railroad’s eastern connection involved Council Bluffs and a Missouri River crossing. Its western route later extended to the Oakland Long Wharf and the San Francisco Bay area. The completed system dramatically reduced coast-to-coast travel time.

Promontory Summit is sometimes confused with Salt Lake City or Ogden, both important Utah railroad locations. The original Promontory route was later bypassed by a lower line, and the historic site is now preserved as Golden Spike National Historical Park.