Air Force

682nd Radar Squadron 

Vigilantia Et Prudentia

We Love Our Tower

The New Beginning

After 60 years the long awaited excitement to see the AN / FPS 24 Long Range Radar Tower up close is HERE !
Almaden Air Force Stations 🇺🇸️ Historic 5 1/2 story reinforced concrete Tower is with a New look on the summit of Mount Umunhum ( RESET )
September 18th 2017. The summit on Mount Umunhum was opened up to the general public. ( at no charge ) Yes you can visit for FREE!

If you are planning a visit to see Mount Umunhum's majestic views and hear The Towers whispers...
You can download the Stories of Mount Umunhum Audio Tour App for your smartphone to experience a "virtual" guide around the summit.
Learn how Mount Umunhum got its name, and hear Air Force veterans, Native Americans and others tell their personal stories about life on the mountain.

Apple iOS Download Android Download

With continued Dedication from The Umunhum Conservancy to the restoration and preservation of The Tower.
We still have a lot of work to do for the Tower
You Can Help !
Please visit: Umunhum Conservancy Inc

We also ask you to help us look after Mount Umunhum and our beloved Tower
To report an emergency on District lands, call (650) 968-4411.
This is the 24-hour dispatch number for District Rangers. Please call this number to report:

A medical, police, fire or other emergency
In-progress suspicious activity or crime
A missing person
Any urgent situation for which you need immediate assistance
Please have the name of the preserve and your location (ex. the trail you are on, or if you’re in the parking lot) available to assist the dispatcher in sending you the appropriate resources.

To report maintenance needs, or for routine questions or information, call the District’s Administrative Office at (650) 691-1200
This number is answered during regular business hours, and voice mail is available outside of regular hours. E-mail can also be sent to

Almaden Air Force Station
Mount Umunhum Rd
Santa Clara County, California 95032
682nd Radar Squadron
Permanently Closed in 1980
Now Open to the Public September 18th, 2017.

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