The Promontory Mountains are a range in Box Elder County, Utah.
The range is oriented north-south and has a length of about 35 miles (56 km).
The southern portion forms a cape extending 20 miles (32 km) south into the Great Salt Lake.
The First Transcontinental Railroad was completed with the Golden Spike just north of the range at Promontory Summit in the Utah Territory.
 Today, trains cross the Promontory Point at the southern tip of the range via the Lucin Cutoff railroad causeway across the lake.
The Promontory Mountains are a range in Box Elder County, Utah. The range is oriented north-south and has a length of about 35 miles (56 km). The southern portion forms a cape extending 20 miles (32 km) south into the Great Salt Lake. The First Transcontinental Railroad was completed with the Golden Spike just north of the range at Promontory Summit in the Utah Territory.  Today, trains cross the Promontory Point at the southern tip of the range via the Lucin Cutoff railroad causeway across the lake.
Promontory Mountains