Best mountain peaks in Santa Clara County offer diverse landscapes and notable features. The region is characterized by its varied terrain, including the Diablo Range and Santa Cruz Mountains. These peaks provide opportunities to explore natural areas and historical sites. The county's mountains are a significant part of its geographic identity.
Last updated: April 24, 2026
Highlight • Summit
Tip by
Highlight (Segment) • Climb
Tip by
Sign up now to discover places like this
Get recommendations on the best single tracks, peaks, & plenty of other exciting outdoor places.
Sign up for free
Highlight • Summit
Tip by
Highlight • Summit
Tip by
Highlight • Monument
Tip by
Highlight • Summit
Tip by
Highlight • Summit
Tip by
Highlight • Climb
Tip by
Highlight • Viewpoint
Tip by
Highlight (Segment) • Viewpoint
Tip by
Sign up for free to discover even more peaks in Santa Clara County.
Sign up for free
Already have an account?
Start today with a free account
Your next adventure awaits.
Login or Signup
Popular around Santa Clara County
Bay Area Ridge Trail — Circumnavigating the San Francisco Bay
Bay Area Ridge Trail — Hiking the backbone of The Bay
Chasing flow in the Bay Area
Classy road bike rides on the SF peninsula
Hiking in Santa Clara County
Road Cycling Routes in Santa Clara County
Cycling in Santa Clara County
Running Trails in Santa Clara County
MTB Trails in Santa Clara County
Gravel biking in Santa Clara County
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!
0
0
Biggest peak in the area. If you go when it's open (weekends as of today), you can do the tour of what was once the largest telescope in the world (still one of the biggest refraction telescopes). The observatory is still active
0
0
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.
0
0
Lick Observatory is a must-visit destination for cyclists, featuring historic and modern telescopes, including the world’s largest glass lens observatory. Free tours provide fascinating insights into astronomy and the observatory’s history. At 4,209 feet, temperatures can drop significantly compared to Silicon Valley, especially in winter—bring warm layers.
0
0
Black Mountain, situated on Monte Bello Ridge, is a popular destination for hikers and mountain bikers. With an elevation of 2,812 feet, it's easy to understand why. From the summit, the views of the Santa Cruz Mountains and Silicon Valley are breathtaking.
0
0
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.
0
0
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.
0
0
Maisie's Peak offers panoramic views of the surrounding open space and Diablo Mountain range at 1,180 feet of elevation. This is the highest point in the park.
0
0
Santa Clara County features several notable peaks. Mount Hamilton, at 4,265 feet, is home to the Lick Observatory and offers expansive views. Mount Umunhum, standing at 3,486 feet, is known for its iconic radar tower and panoramic views. Loma Prieta, the highest peak in the Santa Cruz Mountains at 3,790 feet, is geologically significant. Other prominent peaks include Black Mountain in Monte Bello Open Space Preserve and Mount Sizer in Henry W. Coe State Park.
Many peaks offer stunning panoramic views. From Mount Hamilton, you can see Mount Tamalpais, the Santa Cruz Mountains, Monterey Bay, and even Yosemite National Park on clear days. Mount Umunhum provides vistas of the San Francisco Bay, Monterey Bay, and the Santa Cruz Mountains. Black Mountain offers undisturbed views across Palo Alto, Stanford, and the Silicon Valley to the Pacific Ocean.
Yes, several peaks have significant historical features. Mount Hamilton is home to the Lick Observatory, the world's first permanently occupied mountain-top observatory. Mount Umunhum features "The Cube," an iconic radar tower from its past as a Cold War Air Force station. Loma Prieta is known for its geological significance related to the San Andreas Fault and the 1989 earthquake named after it.
The best time to visit generally depends on your activity. Spring (March to May) is ideal for wildflowers and pleasant temperatures. Fall (September to November) also offers comfortable hiking weather and clear skies. Summer can be hot, especially at lower elevations, but higher peaks like Mount Hamilton can be cooler. Winter can bring dramatically lower temperatures and even snow at higher elevations, such as Mount Hamilton, so warm clothing is essential.
While some trails can be challenging, many open space preserves in Santa Clara County offer trails suitable for families. For example, the summit area of Mount Umunhum includes a viewing platform and a 1.6-mile Summit Loop Trail, which is more accessible. Maisie's Peak, at 1,181 feet, is another accessible viewpoint with panoramic views.
The mountain peaks and surrounding preserves are rich in biodiversity. You might spot golden eagles nesting on the slopes of Mount Hamilton. Areas like Mount Umunhum feature oak woodlands, chaparral, and wildflowers, making them great for wildlife viewing, including various bird species and potentially deer or other small mammals.
The region offers a variety of outdoor activities. Cycling is very popular, especially the winding 19-mile Mount Hamilton Road (State Route 130) which is a challenging climb. Mountain biking is also popular in areas like Monte Bello Open Space Preserve, which features flowing trails and fire roads. You can find more routes for cycling, hiking, and mountain biking in the area by visiting the Cycling in Santa Clara County, Hiking in Santa Clara County, and MTB Trails in Santa Clara County guides.
Yes, Santa Clara County offers challenging trails. For instance, Mount Sizer in Henry W. Coe State Park features routes like "The Shortcut," a fire road with an average grade of 22% that rises about 1,500 feet in 1.3 miles. The Summit of Sanborn County Park also offers challenging trails.
Many trails offer unique natural features. The hike to the epicenter of the 1989 earthquake near Loma Prieta in Nisene Marks State Park reveals geological impacts like snapped redwoods. Mount Umunhum is known for its diverse ecosystems, including oak woodlands and chaparral. Indian Rock is another natural monument and viewpoint.
Visitors frequently highlight the stunning views, the sense of solitude, and the diverse natural beauty. Many enjoy the challenging climbs and the opportunity to connect with nature. The historical significance of sites like Lick Observatory and the iconic radar tower on Mount Umunhum also add to the unique experience.
The Mount Hamilton Road (State Route 130) is a highly recommended route for cyclists due to its long, steady climb, sparse traffic, and spectacular views. It's a popular choice for those seeking a challenging road cycling experience. You can find more cycling routes in the Cycling in Santa Clara County guide.
Yes, Mount Umunhum offers both. While hiking its trails, you can enjoy panoramic views and also learn about its past as an Air Force radar station through interpretive signs near "The Cube." Similarly, the area around Loma Prieta provides beautiful views alongside insights into the geological history of the San Andreas Fault.


Discover Santa Clara County’s best peaks and summits by region:
See even more amazing summits in Santa Clara County with these guides: