- source: Getty Thesaurus of Geographic Names
- source: Family History Library Catalog
- the text in this section is copied from an article in Wikipedia
Promontory in Box Elder County, Utah, United States, is notable as the location of Promontory Summit where the United States' Transcontinental Railroad was officially completed on May 10, 1869.
It is at an elevation of above sea level. Promontory is west of Brigham City, Utah and northwest of Salt Lake City, and north of the Great Salt Lake.