|Elevation||207 ft (63 m)|
Mountain House (formerly, Zimmerman's and Zimmerman's Mountain House) was a historic waystop for forty-niners halfway from San Francisco to the Sierra Nevada gold country. Today it is an unincorporated community in Alameda County, California, United States. It is located 12 miles (19 km) east-northeast of Livermore, and 6 miles (9.7 km) east of the Altamont Pass, historically the Livermore Pass, at an altitude of 207 feet (63 m), between the California Aqueduct and the Delta-Mendota Canal. San Joaquin County's Mountain House borrowed the name of the historic Mountain House and is located two miles (3 km) to the northeast further downstream on Mountain House Creek.
In 1849 Thomas Goodall erected a blue denim cloth tent to serve as a midway stopover for gold miners headed from San Francisco to the Sierra Nevada (U.S.) foothills via Altamont Pass. Goodall eventually built an adobe house at the eastern edge of the Diablo Range hills, calling it The Mountain House. Simon Zimmerman later acquired the stop and it became known as Zimmerman's Mountain House, and became a well-known way station stop on the way to Stockton. The last remaining settlement buildings were leveled in 1940. In November 1994, the San Joaquin County Board of Supervisors officially launched the new community of Mountain House two miles to the northwest along Mountain House Creek.
The Elk Horn post office, which operated from 1852 to 1853, was located at or near Mountain House.
The Mountain House Bar now occupies the site of the original Mountain House, and is located at 16784 West Grantline Road.
- U.S. Geological Survey Geographic Names Information System: Mountain House, Alameda County, California
- Durham, David L. (1998). California's Geographic Names: A Gazetteer of Historic and Modern Names of the State. Clovis, Calif.: Word Dancer Press. p. 667. ISBN 1-884995-14-4.
- Mahler, Les (September 18, 2006). "Mistaken civic identity: Will the real Mountain House stand up?". Oakland Tribune. Retrieved March 20, 2016.
- Wallace, William J. (1978). Robert F. Heizer (ed.). Northern Valley Yokuts, in Handbook of North American Indians, Volume 8, California. Washington, D.C.: Smithsonian Institution. pp. 462–470. ISBN 9780160045745.
- History of Tracy, California with Biographical Sketches. Los Angeles, California: Historic Record Company. 1923.
- Gary Kinst, ed. (July 2008). "Mountain House, in The Traveler, Lincoln Highway Association California Chapter Newsletter" (PDF). Vol. 9 no. 3. Retrieved 2016-03-20.