Promontory is an area of high ground in Box Elder County, Utah, United States, 32 mi (51 km) west of Brigham City and 66 mi (106 km) northwest of Salt Lake City. Rising to an elevation of 4,902 feet (1,494 m) above sea level, it lies to the north of the Promontory Mountains and the Great Salt Lake. It is notable as the location of Promontory Summit, where the First transcontinental railroad from Sacramento to Omaha in the United States was officially completed on May 10, 1869. The location is sometimes confused with Promontory Point, a location further south along the southern tip of the Promontory Mountains. Both locations are significant to the Overland Route: Promontory Summit was where the original, now abandoned, alignment crossed just north of the Promontory Mountains; while Promontory Point is where the modern alignment, called the Lucin Cutoff, crosses the southern tip of the Promontory Mountains.
Andrew J. Russell's picture recording the meeting of the First transcontinental railroad
The Last Spike by Thomas Hill (1881)
Aerial view of the trestle over the northern part of the Great Salt Lake west of Ogden in Box Elder County, Utah, with the replacement causeway on right (August 1971)
The Golden Spike National Historic Site, with replicas of the Central Pacific's Jupiter and the Union Pacific's No. 119 re-enacting the Golden Spike ceremony
Box Elder County is a county at the northwestern corner of Utah, United States. At the 2020 census, the population was 57,666, up from the 2010 figure of 49,975. Its county seat and largest city is Brigham City. The county was named for the box elder trees that abound in the county.
Box Elder County Courthouse, January 2010
Box Elder County float, 1912
Corinne. Staff of the Daily Reporter. Box Elder County, Utah., 1869 - 1878