- Established: 1869, by Central Pacific Railroad, during construction of original transcontinental railroad
- Miles from San Francisco: 678.8
- Used by Railroad: 1875- 1907
- Railroad Function: Junction point; no facilities existed here
- Historic Significance: Umbria Junction was junction point of the Lucin Cutoff, constructed in 1904, which bypassed The Promontory Branch, including Terrace and Kelton; traversed the Great Salt Lake on a direct causeway to Ogden
- Location: Westernmost point in Utah on “The Promontory Branch of the First Transcontinental Railroad in Utah 1869-1904” map, from Rails East to Promontory The Utah Stations
- No population figures on this rail siding
