Mt Umunhum is the highest point of the Sierra Azul
|Elevation||883 m (2,897 ft)|
|District||Santa Clara County|
|Topo map||USGS Los Gatos|
The Sierra Azul is a mountain range in Santa Clara County, California. It is the southern half of the Santa Cruz Mountains range, which is divided into two parts by California Highway 17 into what the colonizing Spanish called the Sierra Morena or "Brown Mountains" to the north and the Sierra Azul or "Blue Mountains" to the south. Part of the range is within the Sierra Azul Open Space Preserve.
The highest peak is Mount Umunhum, the site of the former Almaden Air Force Station radar site and the current location of a NEXRAD weather radar of the National Weather Service which serves the San Francisco Bay Area and Monterey Bay Area.
- "Sierra Azul". Geographic Names Information System. United States Geological Survey. Retrieved 2009-05-04.
- Erwin Gustav Gudde (1960). California Place Names: The Origin and Etymology of Current Geographical Names. University of California Press. p. 18. Retrieved 2014-07-26.
- John Hunter Thomas (1991). Flora of the Santa Cruz Mountains of California: A Manual of the Vascular Plants. Stanford University Press. p. 5. ISBN 978-0-8047-1862-2. Retrieved 2014-07-26.
- Luther A. Ingersoll (1893). Henry D. Barrows, ed. A memorial and biographical history of the coast counties of Central California. Lewis Publishing Company. p. 190. Retrieved 2014-07-26.
- Sierra Azul Open Space Preserve website — part of the Midpeninsula Regional Open Space District system.
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