Current Progress | Goals/Objectives | Summit Design | Area Closures | Project Timeline | Video

The Mount Umunhum Summit project is an excellent reflection of Midpen's three-part mission statement: to preserve open space, to protect and restore the natural environment, and to provide opportunities for ecologically sensitive public enjoyment and education.

Location and Background

Mount Umunhum, one of the great peaks of the Bay Area, is located south of Los Gatos and east of the Lexington Reservoir in the 21,000-acre Sierra Azul Open Space Preserve. At 3,486 feet, it’s the fourth-highest peak in the Bay Area and features spectacular 360-degree views that extend from the Monterey Peninsula to Mount Tamalpais, much of the Bay Area and even the Sierra Nevada on a clear day. It also home to 63 unique plant and animal species. 

In addition to its unique habitats and geological features, Mount Umunhum has an important role in the region’s local and cultural history. For millennia, Native Americans have celebrated their traditions and histories at Mount Umunhum. The word “Umunhum” means “resting place of the hummingbird”, and signifies the delivery of fire to the Amah Mutsun people.

From 1957 to 1980, the summit was the site of the former Almaden Air Force Station where it served as part of a network of radar stations.  The square concrete structure at the top of Mount Umunhum was once the base for a large Cold War-era radar sail.  The summit has been closed since 1980 when the base was decommissioned. In 2009, Midpen received federal funding, which enabled Midpen to clean up the site. Over 3,000 cubic yards of hazardous materials, including lead paint, asbestos, fuel storage containers and PCB transformers were removed along with13,680 tons of concrete, asphalt, wood and other materials, 97% of which were recycled or reused.

Midpen plans to open the summit to the public in the fall of 2016 so that people can enjoy and experience Mount Umunhum up close.
 

Current Progress

  • The Bald Mountain Parking Area is open to the public.
  • Planning for ecological restoration and visitor amenities at the summit is underway.
  • Much of the summit has been recontoured and returned to its natural state.
  • Restoration will focus on naturalizing the topography and restoring native habitat. The summit will be fully accessible to visitors of all abilities and will feature a ceremonial circle, view points, shaded picnic areas, and interpretive features and programs.
  • The Mount Umunhum Trail and the associated bridges are currently under construction.  The trail will connect the Bald Mountain Parking Area to the summit of Mount Umunhum, and is expected to open for public use no later than spring 2017, or as soon as possible following construction and once facilities at the summit have been completed.
     

Goals and Objectives

The primary goal of the Mount Umunhum Summit Project is to establish a visitor destination that balances public access, enjoyment, and education with environmental restoration. This aligns with two directives of Midpen's Mission: to protect and restore the natural environment, and to provide opportunities for ecologically-sensitive public enjoyment and education. This goal will be achieved through the following:

  • Create a destination that is accessible to and accommodates a broad range of user groups and introduces new visitors to open space.
  • Remove or permanently cap physical hazards and restore the native landscape and habitat for wildlife as much as possible.
  • Provide minimal visitor amenities that complement and highlight the world-class views and open space experience.
  • Provide ample, rich, and diverse trail experiences for hikers, bicyclists, and equestrians.
  • Highlight the rich natural and cultural history of the site through self-discovery and focused interpretive and educational opportunities.

In the near term, providing public access to the summit of Mount Umunhum as soon as possible (target: fall 2016) is a primary goal of this project. Once completed, visitors to the summit will find an ADA-accessible interpretive trail, information about the area’s rich natural and cultural history, and expansive views of the entire Bay Area, Monterey Bay, Santa Cruz, and even the Sierra Nevada.

Summit Design

Midpen’s vision has always been for Mount Umunhum to join the ranks of the Bay Area’s great publicly-accessible peaks: Mount Tamalpais, Mount Diablo and Mount Hamilton. To achieve that, Midpen spent three years researching potential options for the summit, listening to the public, and distilling that information into its 2012 plan that includes widening and repaving the 5-mile road, new parking and staging areas, gorgeous multi-use trails, a Native American ceremonial space, a spectacular overlook and three options for the “Cube,” the five-story concrete structure that once supported a radar sail when the former Almaden Air Force Station was active and is currently a prominent feature on the summit. 

Final  Design Development Option for the Mount Umunhum Summit ProjectOn August 26, 2015, the Board of Directors approved 7 - 0 the Final Design Development Options for the Mount Umunhum Summit Project, and directed District staff to look for areas for additional shade structures at the summit.  These design development options DO NOT include recommendations for the Radar Tower. This decision allows staff to proceed with final design development and production of construction documents, which will form the basis for permit submittals and a Request for Bids package.  Full details available in Board Report R-15-126.

Artist renderings of summit designSummit Features

Visitor amenities at the summit will include parking, ADA accessible pathways and trails, vault toilets, and multiple viewing coves featured across the west and east summit, providing visitors with a vantage point for world class views of the valley below.

In addition to public access, the Summit Project provides for the restoration of natural landforms, and planting of native vegetation.

 

 

Options for the Cube

Option 1: Restore the MountaintopOPTION 1: RESTORE THE MOUNTAINTOP
As much as possible, the summit of Mount Umunhum would be returned to its natural state. The Cube would be removed and recycled; and the land would be revegetated. The 2,000-square mile, 360-degree views from the summit would be completely unobstructed. Interpretive materials would share the summit’s important cultural, military and natural histories with the public.

Estimated construction costs: $640,000*

 

Option 2: Open Air Gathering PlaceOPTION 2: OPEN AIR GATHERING PLACE
In this option, the summit would be returned to a more natural state, but a portion of the Cube walls and columns would be retained for an open air structure with interpretive materials that protects visitors from the high winds and, at times, glaring sun. Visitors would be able to enjoy the views and interpretive materials and would also be able to see, touch and experience the Cube and its interior walls.

Estimated construction costs: $817,000*

 

Option 3: Seal and RetainOPTION 3: SEAL AND RETAIN
In this option, with the participation of a partner, the Cube would be kept and sealed for public safety. Structural damage would be repaired and a new roof installed. The Cube would continue to be the most prominent feature at the summit and would occlude much of the view at this vista point. Interpretive materials would be provided along its exterior walls.

Estimated construction costs: $1,106,000*

*Based on 2012 cost estimates

 

Closures in Sierra Azul Open Space Preserve

In order to protect public safety and guarantee security, some portions of Sierra Azul's Mount Umunhum area are closed until the site is fully remediated and secure public access can be established.

Please note that the Mount Umunhum and Mount Thayer areas, where remediation work is ongoing, are designated Hazardous Closed Areas. Anyone who trespasses into the area will be cited for a misdemeanor.

Areas that are adjacent to Mount Umunhum and Mount Thayer are declared Temporary Closed Areas. Trespassers will be cited for an infraction. Please refer to the attached map for details.

Project Timeline

October 2017 Deadline for proponents of the Cube to establish and develop partnerships, funding, and other resources to allow for implementation of Option 3, Retain and Seal (per Interim Action).
Fall 2016 Anticipated opening of the Summit to the public.
November 2014 Bald Mountain Parking Area open to the public.
February 2014 Demolition of structures (except the Cube) complete at the former Almaden Air Force Station, 97% of the building materials were recycled.  As a part of the demolition work, erosion control measures were installed, and slopes were re-contoured as much as possible to match the original ridges and swales that existed prior to construction of the Almaden Air Force Station.
February 2013 $1 million grant received from the California Coastal Conservancy. The grant supported project implementation and fund a majority of the construction costs for the Bald Mountain Parking Area, Mount Umunhum Trail, and visitor amenities at the summit.
October 2012 The Board of Directors selected Interim Action A: Near-term repair and securing of the Cube while considering external partnerships.
July 2011 The Army Corps of Engineers contractor completes hazardous materials remediation work.

Video

On Sunday, May 3rd, Open Road featured a story about the restoration work in progress on Mount Umunhum.  Segment begins at 6:20.

On July 20, 2011, KQED QUEST aired a television piece entitled Mount Umunhum: Return to the Summit, that shows the mountain before project work began.

 

Contact Information

 

For questions or comments regarding the Mount Umunhum Summit Project, please contact Meredith Manning, Senior Planner.

 

  • Bald Mountain Parking
    The new Bald Mountain Parking area is now open to the public
  • Bald Mountain Groundbreaking
    District Board Members, Staff and Partners gathered together for the Groundbreaking for the Bald Mountain Parking Area on April 23, 2014. © Jack Gescheidt
  • nest box
    Nesting boxes for rare Purple Martins installed on the summit
  • Mount Umunhum Summit
    Sunrise at the summit
  • Mount Umunhum vista
    A brand new vista has been opened up where buildings once stood. Looking west towards Ben Lomond Mountain in the distance.
  • Mount Umunhum demolition
    Clean wood from demolished buildings was ground into mulch and used onsite for erosion control.