Sentinel in the Sky

1:00 PM–3:00 PM · Sierra Azul Preserve · San José Free

Learn what daily life was like at the Almaden Air Force Station on Mt. Umunhum during the Cold War.

What was it like living and working at the Almaden Air Force Station on Mt. Umunhum during the Cold War?

When

Sunday, December 13, 2026 · 1:00 PM–3:00 PM

Where

Sierra Azul Preserve — Mt. Umunhum Summit Parking Area at the top of Mt. Umunhum Road, San José Map ↗

Listed by

Midpen Open Space

Refreshed

Oct 19, 2026, 8:41 PM PDT