Best mountain peaks around Los Gatos are found within the Santa Cruz Mountains, offering access to diverse natural landscapes. The region is characterized by its foothills and prominent peaks, many of which are part of the Sierra Azul Open Space Preserve. These locations provide varied terrain for outdoor activities and offer expansive views of the surrounding areas. The peaks also hold natural and historical significance, including former military sites and Native American heritage.
Last updated: April 24, 2026
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Still one of the highest points in the Santa Cruz Mountains, even though the military graded and flattened the actual summit to create an Air Force base. The summit was cleaned of hazardous material in 2009, then carefully restored after a lot of community input. It's a lovely place to visit now!
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Climbing Mount Umunhum is a tough but rewarding challenge. The road is steep, with sections reaching up to 18% grades, so pace yourself. The views from the top are spectacular, making the hard work worth it. Start early to avoid traffic and the heat, and be prepared for a long, demanding ascent.
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The Peak is a 3,005-foot mountain in Santa Clara County. The high point is marked by a large mossy rock, a short distance away from the end of the trail. This is a great, challenging summit for any mountain biker.
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Serving as a scenic backdrop to the town of Los Gatos, St. Joseph's Hill is a 1,250-foot hill that looks down Los Gatos Creek valley and down over nearby Lexington Reservoir. It is also the summit of the Manzanita trail, which is a classic ride best done on a gravel bike.
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Indian Rock, a natural climbing spot, is located at the entrance of the Sanborn-Skyline County Park. The rock consists of Sandstone, but don't have the red colors that are so commonly found in the American southwest.
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At 3,486 feet, this peak stands as one of the highest in the region. It features a distinctive block-shaped radar tower that played a crucial role in the military's missile defense system. From this vantage point, you can enjoy a panoramic 360-degree view of the entire area.
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One of the highest virtually car-free road climbs in the South Bay, Mount Umunhum became quickly one of the most popular biking destinations since opening to the public in 2017 after being closed several decades for military radar operations. The hard work is rewarded with spectacular 360 degree views of the Sierra Azul Open Space Preserve and the surrounding hills, all the way to the Pacific Ocean in the West and the SF Bay to the north. Modern restrooms, drinking water fountains, and viewing terraces with benches welcome the weary. Don't be afraid, or too overwhelmed by your superpowers if you look at komoot's 9800 ft uphill climb estimate for this highlight. Their software is off by a factor of 5x or more. The actual elevation difference is around 1800 feet (about 600 meters). According to GoogleMaps the distance is only 5.2 miles, with about 2000 feet uphill. Even that is not bad, and you deserve to be proud ;-)
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Indian Rock, natural climbing spot is located at the entrance of the Sanborn-Skyline County Park. The rock consists of Sandstone but don't have the red colors that are so commonly found in the American southwest.
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The Santa Cruz Mountains surrounding Los Gatos offer several prominent peaks. Mount Umunhum Road (climb) leads to Mount Umunhum, known for its Cold War-era radar station and 360-degree views. Saint Josephs Hill summit provides scenic views over Los Gatos and Lexington Reservoir. Other significant peaks include Mount El Sombroso and Mount Hamilton, home to Lick Observatory.
The peaks offer diverse and expansive views. From Mount Umunhum, you can enjoy panoramic vistas stretching from the Pacific Ocean to the Sierra Nevada on clear days. Saint Josephs Hill summit provides views down the Los Gatos Creek valley into Silicon Valley and across Lexington Reservoir. View from Maisie's Peak offers panoramic views of the surrounding open space and the Diablo Mountain range.
Yes, the area caters to various fitness levels. For challenging climbs, trails on Mount El Sombroso, such as the 11.9-mile Mount El Sombroso via Kennedy Trail, offer significant elevation gain. The climb up Mount Umunhum Road is also a tough but rewarding ascent. For a more moderate experience, Saint Josephs Hill summit is accessible via trails like the Manzanita trail, providing a rewarding local summit experience.
Mount Umunhum is notable for 'The Cube,' a former Air Force radar station from the Cold War, and its summit features interpretive signs detailing its natural and military history, along with a ceremonial circle honoring Native American heritage. Mount Hamilton is home to the historic Lick Observatory, the world's first permanently occupied mountaintop observatory. Indian Rock is a natural climbing spot made of sandstone located at the entrance of Sanborn-Skyline County Park.
The region offers a wide range of outdoor activities. You can find numerous routes for mountain biking, hiking, and road cycling. For mountain biking, consider routes like the Collords Peak – Kennedy Trail loop or the challenging Mount Umunhum loop. Hikers can explore trails like the Los Gatos Creek Trail or the Lexington Reservoir loop. Cyclists often enjoy the scenic Mount Hamilton Road or the Mount Umunhum Road (climb). You can find more details on these activities in the MTB Trails around Los Gatos, Easy hikes around Los Gatos, and Cycling around Los Gatos guides.
While many trails in the Sierra Azul Open Space Preserve are suitable for active families, specific family-friendly designations depend on the trail's length and difficulty. For dog-friendly options, View from Maisie's Peak is noted as dog-friendly. Always check specific park regulations regarding dogs before your visit.
The Los Gatos area generally offers good hiking conditions for much of the year. Spring and fall are often ideal, with milder temperatures and vibrant natural scenery. Summer can be warm, so starting early to avoid the heat is advisable. Winter hiking is possible, but conditions can vary, especially at higher elevations, so check local weather forecasts.
The peaks in the region vary in elevation. Mount Umunhum stands at 3,486 feet, making it one of the highest in the Santa Cruz Mountains. Mount El Sombroso reaches 2,999 feet. Mount Hamilton, further afield in the Diablo Range, is the highest at 4,265 feet. Closer to town, Saint Josephs Hill is 1,250 feet, and Maisie's Peak is 1,181 feet.
Yes, the mountain peaks and surrounding preserves are home to diverse wildlife. Birdwatchers, in particular, will find Mount Umunhum a rewarding destination. The varied habitats across the Sierra Azul Open Space Preserve support a range of local fauna, so keep an eye out for birds, deer, and other animals during your visit.
While popular spots like Mount Umunhum can attract many visitors, especially on weekends, exploring trails within the larger Sierra Azul Open Space Preserve or venturing to peaks slightly further from Los Gatos, such as Mount El Sombroso, might offer a more secluded experience. Early morning visits also help avoid crowds on any trail.
Visitors frequently praise the spectacular 360-degree views from summits like Mount Umunhum and Maisie's Peak. The challenging yet rewarding climbs, the sense of accomplishment, and the blend of natural beauty with unique historical features like the former radar station on Mount Umunhum or Lick Observatory on Mount Hamilton are also highly valued. The well-maintained trails and facilities, such as restrooms and viewing terraces, enhance the experience.


See even more amazing summits around Los Gatos with these guides: