May 4, 2026
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Photo attribution
(c) lazarus, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.

El Sereno Open Space Preserve offers breathtaking vistas and expansive trails in the Santa Cruz Mountains.
El Sereno Open Space Preserve offers breathtaking vistas and expansive trails in the Santa Cruz Mountains. Part of the Midpeninsula Regional Open Space District, this 1,614-acre preserve rises from rolling foothills to the majestic 2,500-foot Mount El Sereno. It serves as a vital natural escape, showcasing California's diverse ecosystems and offering a serene backdrop to the bustling Silicon Valley below.
The preserve boasts approximately seven miles of multi-use trails, welcoming hikers, mountain bikers, horseback riders, and dog walkers. These trails wind through vibrant chaparral communities, sun-drenched meadows, and occasional shaded areas near creeks. Along your journey, you'll encounter a rich tapestry of native California plants such as fragrant California bay laurel, resilient chamise, widespread coyote bush, and the distinctive yerba santa. Keep an eye out for diverse manzanita and ceanothus varieties, as well as the unique California coffeeberry.
Visiting El Sereno Open Space Preserve is an opportunity to immerse yourself in nature and witness some of the region's most spectacular scenery. On clear days, the ridgelines provide sweeping panoramic views of Silicon Valley, the serene Lexington Reservoir, and the distant Sierra Azul and St. Joseph's Hill Open Space Preserves; some fortunate visitors might even glimpse the Monterey Peninsula. Beyond the views, the preserve is home to local wildlife, including mule deer, coyotes, gopher snakes, and brush rabbits, making every visit a chance for a memorable encounter with the natural world. Don't forget to bring the Snappit nature identification app along to scan local species.
El Sereno Open Space Preserve holds a significant place in the conservation efforts of the Midpeninsula Regional Open Space District, which acquired the land in 1975, making it one of the organization's oldest preserves. In a continued commitment to expanding public access and preserving natural connections, Midpen partnered with the Peninsula Open Space Trust in 2020-2021 to acquire an additional 182 acres. This crucial expansion linked two segments of the Aquinas Trail, integrating it into the broader Bay Area Ridge Trail network and enhancing the preserve's connectivity. To honor his dedication to open space, a commemorative bench for State Senator Jim Beall was installed along the Aquinas Trail in December 2020, offering a scenic spot overlooking Lexington Reservoir and San Jose.
Engage in hiking, trail running, mountain biking, or horseback riding on designated multi-use trails. Enjoy birdwatching and wildlife viewing, and capture stunning landscape photographs.
Summers can be very hot and trails are largely exposed with limited shade, making spring and fall more comfortable. Wildflowers are abundant in spring.
While the preserve offers wide, gradual trails, some sections can be steep, reflecting its mountainous terrain. Dogs are permitted on all trails, provided they remain on leash.
The primary highlights are the expansive panoramic views from various ridgeline points, including the vista overlooking Silicon Valley, Lexington Reservoir, and neighboring preserves. The Aquinas Trail and Montevina Ridge Trail offer excellent routes for experiencing these views. Don't miss the Senator Beall Commemorative Bench for a picturesque resting spot.
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Hydrate generously
Bring plenty of water, especially on warmer days, as the trails are largely exposed with no public water sources available.
Protect from the sun
Wear appropriate sun protection like hats, sunglasses, and sunscreen, as shade is limited on many parts of the trails.
Carry a map
Although trails are generally well-maintained, carrying a map is advisable, as signage can be minimal in some areas.
Arrive early for parking
Parking is very limited at trailheads, particularly at Montevina Road, so arriving early, especially on weekends, is recommended. Some specific parking areas might require a permit.
Be prepared for elevation
Many trails involve significant elevation changes, so wear sturdy footwear and be ready for some challenging climbs and descents.
Leave no trace
Help preserve the natural beauty by staying on designated trails, packing out all trash, and refraining from disturbing plants or wildlife.
May 4, 2026
Photo attribution
(c) lazarus, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.
May 4, 2026
Photo attribution
(c) lazarus, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.
May 3, 2026
Photo attribution
(c) lazarus, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.
May 3, 2026
Photo attribution
(c) lazarus, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.
May 3, 2026
Photo attribution
(c) lazarus, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.
Massachusetts, US
You might spot Virginia Bluebells and Great Golden Digger Wasp.
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Maryland, US
You might spot White-Tailed Deer and Japanese Knotweed.
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Illinois, US
You might spot White Mulberry, House Finch, and Scissor Grinder.
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Maryland, US
You might spot Great Blue Heron, Eastern Bluebird, and White-Tailed Deer.
View guide →