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Mount Umunhum

Mountain in Coast Ranges near Los Gatos, CA

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Mount Umunhum (Ohlone, meaning resting place of the hummingbird) is the fourth-highest peak in California's Santa Cruz Mountains (after Loma Prieta, Crystal Peak, and Mt. Chual). The mountain is situated in Santa Clara County, south of San Jose. It is sometimes referred to as Mount Um by locals. Most of the mountain is within the Sierra Azul Open Space Preserve. The mountain is topped by a five-story concrete radar tower, known locally as "the Cube" or "the Box". The tower was part of Almaden Air Force Station, a radar surveillance post which operated from 1958 to 1980. The Cube, which housed an 85.5-ton AN/FPS-24 radar, was completed in 1962 and used to watch for hostile aircraft during the Cold War. The summit is closed to the public due to hazardous materials and unsafe, partially…