Sierra Azul Open Space Preserve (Closed Areas)
Sierra Azul Open Space Preserve (Closed Areas)
Attractions and Places To See in Sierra Azul Open Space Preserve (Closed Areas) - Top 4
Best attractions and places to see in Sierra Azul Open Space Preserve (Closed Areas) include prominent peaks, diverse ecosystems, and historical sites. This preserve features significant natural landmarks like Mount Umunhum, one of the highest peaks in the Santa Cruz Mountains, offering panoramic views. The area encompasses varied environments, from serpentine grasslands to oak woodlands, and holds cultural significance for the Amah Mutsun people. While some sections are closed, accessible areas provide opportunities to explore its natural beauty and historical context.
Best attractions and places to see in Sierra Azul Open Space Preserve (Closed Areas)
- The most popular attractions is Mount Umunhum Road (climb), a climb that leads to the summit of Mount Umunhum. This road offers a challenging ascent rewarded with 360-degree views of the Sierra Azul Open Space Preserve and surrounding areas.
- Another must-see spot is Guadalupe Reservoir, a lake feature with scenic vistas. Hicks Road provides several points to view the reservoir.
- Visitors also love Hicks Road Climb, a challenging climb known for its steep sections. This route offers a demanding workout for those seeking elevation gain.
- Sierra Azul Open Space Preserve (Closed Areas) is known for its climbs, lakes, and viewpoints. Visitors can explore a variety of natural and man-made attractions within the accessible parts of the preserve.
- The attractions in Sierra Azul Open Space Preserve (Closed Areas) are appreciated by the komoot community, with 12 upvotes and 55 photos shared by visitors.
Last updated: May 9, 2026
Mount Umunhum Road (climb)
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Guadalupe Reservoir
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Hicks Road Climb
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Kennedy Trail
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The "real" climb starts at about the half mile mark from the trailhead and you don't really reach its worst part until about 1.3 miles into the trail. There's a brief reprieve whose start is identifiable by an unmistakable large tree around which the trail splits into a small clearing.
This spot also acts as a popular rest and regrouping spot for most riders. You still have about 45% of the total trail climb left after that tree and it resumes soon enough. The first spot where you'll find the climb end at a "hilltop" (immediately after an extra steep stretch) is actually the "false top". You still have a bit more climbing left after that, including two of the steepest uphill bursts (one very brief, the second one longer). The second of these last two steep stretches brings you abruptly to the end of the climb.
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Popular around Sierra Azul Open Space Preserve (Closed Areas)
Hiking in Sierra Azul Open Space Preserve (Closed Areas)
Running Trails in Sierra Azul Open Space Preserve (Closed Areas)
MTB Trails in Sierra Azul Open Space Preserve (Closed Areas)
Gravel biking in Sierra Azul Open Space Preserve (Closed Areas)
Road Cycling Routes in Sierra Azul Open Space Preserve (Closed Areas)
Cycling in Sierra Azul Open Space Preserve (Closed Areas)
Tips from the Community
This is not a very exciting trail to hike. Itβs pretty much a trail surrounded by thick walls of vegetation, with almost no opportunity to view your surroundings. The trail is 70% rocks/gravel, and 30% hard packed clay, so avoid wearing snickers
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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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Hicks Road winds around Guadalupe Reservoir. Here, you can see some of the best views of the lake. Please be cautious of cars.
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The Northern Section of Kennedy Trail drops from Priestrock Trail to Kennedy Road. It is mostly a dirt doubletrack that is bikeable for most regular touring and gravel bikes as well.
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The road winds along the southern shore with several good vista points of the dam and the reservoir
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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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The steepest section up Hicks Road. If you want steeper though, turn right on Mount Umunhum Road until Bald Mountain Trailhead before heading back down.
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Nice vistas and sometimes there are Pair of shoes thrown over the phone lines..
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Frequently Asked Questions
What are the best viewpoints in Sierra Azul Open Space Preserve?
For panoramic vistas, head to the summit of Mount Umunhum. It offers sweeping 360-degree views of the Bay Area, Santa Clara Valley, and the Pacific Ocean. Another excellent spot is Bald Mountain, which provides views of the south end of San Francisco Bay, Mount Hamilton, and Almaden Reservoir. You can also find scenic views of Guadalupe Reservoir from Hicks Road.
What natural features can I explore in the preserve?
The preserve boasts diverse ecosystems, including serpentine grasslands, chaparral, shaded oak woodlands, and riparian corridors. You can also see significant natural landmarks like Mount Umunhum, one of the highest peaks in the Santa Cruz Mountains, and El Sombroso Peak. Guadalupe Reservoir is another prominent natural feature.
Are there any historical sites or cultural points of interest in the preserve?
Yes, Mount Umunhum is a sacred site for the Amah Mutsun people, central to their creation story. The summit also features the distinctive blocky radar tower, a relic from the Cold War era when it was part of the Almaden Air Force Station from 1957 to 1980. The area also has historical ties to 19th-century German and Austrian settlements near the New Almaden Quicksilver mining operations.
What kind of wildlife might I encounter in Sierra Azul Open Space Preserve?
The diverse ecosystems within the preserve provide habitat for abundant wildlife. Visitors might spot mountain lions, deer, bobcats, and coyotes, among other species. Always observe wildlife from a distance and do not disturb them.
Are there challenging climbs for cyclists or hikers?
Absolutely. The preserve is known for its challenging climbs. The Mount Umunhum Road (climb) offers a tough but rewarding ascent to the summit, with sections reaching up to 18% grades. The Hicks Road Climb is also known for its steep sections, providing a demanding workout. For hikers, the Kennedy Trail presents a challenging dirt doubletrack climb.
What kind of hiking trails are available?
You'll find a variety of trails, from challenging climbs to more moderate paths. The Kennedy Trail offers a significant climb on a dirt doubletrack. While some areas are closed, accessible sections provide trails through varied terrain, including oak woodlands and chaparral. For more hiking options, consider exploring nearby waterfall hikes listed in the Waterfall hikes in Sierra Azul Open Space Preserve (Closed Areas) guide.
Are there opportunities for cycling in the preserve?
Yes, cycling is a popular activity. The Mount Umunhum Road (climb) is a well-paved road that has become a favorite destination for cyclists since reopening. The Hicks Road Climb also offers a challenging route. For more cycling routes, check out the Cycling in Sierra Azul Open Space Preserve (Closed Areas) guide.
Can I find mountain biking trails near the attractions?
Yes, there are mountain biking opportunities in and around the preserve. While the main attractions focus on climbs and viewpoints, you can find dedicated MTB trails nearby. Explore options like the Mount Umunhum Loop or the Braille Trail Loop by consulting the MTB Trails in Sierra Azul Open Space Preserve (Closed Areas) guide.
What do visitors enjoy most about Sierra Azul Open Space Preserve?
Visitors highly appreciate the challenging climbs and the spectacular 360-degree views from prominent peaks like Mount Umunhum. The well-maintained roads and trails, combined with the diverse natural scenery, make it a rewarding destination for outdoor enthusiasts. The historical significance of the radar tower and the cultural importance to the Amah Mutsun people also add to the unique experience.
When is the best time to visit Sierra Azul Open Space Preserve?
The preserve can be enjoyed year-round, but spring and fall generally offer the most pleasant weather for hiking and cycling, with milder temperatures and clear skies. Starting early in the day is recommended, especially during warmer months, to avoid heat and potential traffic on popular routes like Mount Umunhum Road.
Are there any family-friendly activities or trails?
While many trails offer challenging climbs, there are sections and areas suitable for families. The diverse ecosystems and viewpoints can be enjoyed by all. Always check specific trail conditions and difficulty levels to ensure they align with your family's capabilities. The preserve's natural beauty and historical elements can be engaging for children.
Are dogs allowed on the trails in Sierra Azul Open Space Preserve?
Many open space preserves in the Bay Area have specific rules regarding dogs, often requiring them to be on a leash. It's best to check the official Midpeninsula Regional Open Space District website for the most current regulations regarding dog access on specific trails within Sierra Azul Open Space Preserve before your visit.
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