Mount Umunhum Cold War history: Sentinel in the Sky
Learn about life and history at the Almaden Air Force Station. The walk is about a quarter mile but includes 159 steps, so short distance does not mean step-free access. The meeting point is already at the summit; allow separate time for the mountain drive.
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Details to plan before you go
- 01
Follow the official directions to summit parking; stopping at Bald Mountain would leave an additional uphill hike.
- 02
Arrive early to sign the participation waiver. Follow any reservation requirement added to the official page, and recheck cancellations and trail closures before leaving.
- 03
Bring water, layers and suitable walking shoes. Heavy rain may cancel the outing; the listed finish time is not an exact return guarantee.
- 04
This is not a dog outing. Midpen guided activities allow dogs only when expressly labeled.
Venue · Sierra Azul Preserve; Mount Umunhum summit parking area, in the hills near Los Gatos
For · History enthusiasts comfortable with stairs / Visitors interested in the South Bay hills
Midpeninsula Regional Open Space District
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