This large tower once had a large rotating radar for use to detect enemy aircraft during the Cold War.
It was part of the Almaden Air Force Station.
Mount Umunhum is the the third tallest peak in the San Francisco Bay Area. It offers views of the Santa Clara Valley and of the Pacific Ocean.
After extensive cleanup and sddressimg neighbor concerns, this peak is now part of the Sierra Azul Open Space Preserve.
It was opened to the public earlier this week.
We hiked the gentle graded 3.5 miles to the top from the Bald Mountain parking lot.