4.8
(116)
3,366
riders
22
rides
Road cycling in Sierra Azul Open Space Preserve offers diverse terrain within the Santa Cruz Mountains, featuring challenging climbs and scenic routes. The preserve spans over 19,000 acres, characterized by varied landscapes including serpentine grasslands, chaparral, oak woodlands, and deep ravines. Prominent features include Mount Umunhum and Mount El Sombroso, providing significant elevation gains and panoramic views of the Santa Clara Valley and Lexington Reservoir. The area provides extensive opportunities for no traffic road cycling routes.
Last updated: July 10, 2026
10
riders
70.7km
04:02
1,440m
1,440m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
5
riders
84.5km
04:42
1,430m
1,430m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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4.0
(1)
42
riders
28.7km
02:05
980m
980m
Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
9
riders
39.2km
02:10
630m
630m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
15
riders
Moderate road ride. Great for any fitness level. Some segments of this route may be unpaved and difficult to ride.
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Popular around Sierra Azul Open Space Preserve
If you make the summit a fantastic view awaits. Be aware the road goes down then up to the road about then up again to the summit!β¦
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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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A scenic stop just off the winding roads of the Santa Cruz Mountains, Lexington Reservoir County Park is a great spot to catch your breath and enjoy the view. The smooth pavement along Alma Bridge Road makes it a popular stretch for cyclists, with rolling terrain and minimal traffic. There's parking, restrooms, and shaded areas if you need a break. From here, you can loop toward Los Gatos or push deeper into the climbs of Highway 17 and Old Santa Cruz Highway.
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Los Gatos Coffee Roasting Company has been crafting coffee since 1982, becoming a beloved gathering spot for locals. They offer local wines, craft beers, and live music events on Thursdays, Fridays, and Saturdays from 7β9 PM. Visitors can enjoy espresso, tea, pastries, and fresh coffee beans to take home. Seating is available indoors, outdoors, and in a designated parklet.
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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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If you're in Santa Cruz, Regale Vineyards is a must-visit. Nestled in the Santa Cruz Mountains, it offers more than just great wine β the views are incredible. Whether you're enjoying a tasting on the patio or strolling through the vineyards, youβll be surrounded by lush greenery and towering redwoods. Itβs a peaceful spot to relax and soak in the beauty of the area. Plus, the wines are fantastic, showcasing the best of the region.
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An excellent spot to take a break and enjoy the full breath of Lexington Reservoir. There is a Plaque dedicated to deputy Douglas B. Miller, who was fatally wounded while performing his duties.
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Forbes Mill Museum, housed in a two-story building of the original 1854 flour mill, offers a glimpse into Los Gatos' history. Built by James Alexander Forbes as California's first commercial flour mill, over the years, it served various roles, including a power plant and a PG&E substation. Saved from demolition in 1982, the building now features historical exhibits as part of New Museum Los Gatos.
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There are over 20 dedicated no-traffic road cycling routes in Sierra Azul Open Space Preserve, offering a variety of distances and elevation gains. You'll find options ranging from easy to difficult, ensuring there's something for every fitness level.
While many routes aim for minimal traffic, some sections, like Mount Umunhum Road, are well-paved and experience very mild vehicle traffic, making them excellent for road cycling. Other routes may utilize multi-use trails or quiet roads with limited vehicle access. For a truly easy, low-traffic experience, consider the Alamitos Creek Trail β Pfeiffer Park loop from Leigh High School.
While specific facilities can vary by trailhead, it's always recommended to carry sufficient water and snacks, especially on longer rides, as water sources might be limited along the routes. Plan your stops in nearby towns like Los Gatos or San Jose for more amenities.
E-bike policies can vary within open space preserves. It's best to check the official Santa Clara County Parks website or the Midpeninsula Regional Open Space District website for the most current regulations regarding e-bike use on paved roads and multi-use trails within Sierra Azul Open Space Preserve before you head out.
Yes, there are several easier routes suitable for families looking for a less strenuous ride. The preserve offers 9 easy routes, such as the Alamitos Creek Trail β Pfeiffer Park loop from Leigh High School, which features less elevation gain and a more relaxed pace, ideal for a family outing.
Spring and fall generally offer the most pleasant weather for road cycling in Sierra Azul, with cooler temperatures and lush landscapes. Weekdays are typically less crowded than weekends, offering a better chance for a truly no-traffic experience. Summer can be hot, so early morning rides are advisable.
Parking is available at various trailheads and access points around the preserve. Popular starting points include areas near Lexington Reservoir County Park, such as for the Roadbike loop from Lexington Reservoir County Park, or near Leigh High School for routes like the Alamitos Creek Trail β Pfeiffer Park loop.
Sierra Azul Open Space Preserve offers spectacular panoramic views. Routes often lead to vistas overlooking the Santa Clara Valley, Lexington Reservoir, and the surrounding Santa Cruz Mountains. The climb up Mount Umunhum Road, for example, rewards cyclists with 360-degree views from the summit, including Silicon Valley and the Bay Area.
Absolutely. The preserve is known for its challenging climbs and significant elevation gains. Routes like the Mount Umunhum Road β Mount Umunhum loop from Oak Meadow offer over 1,300 meters of climbing, providing a substantial workout with rewarding views. There are 6 difficult routes available for those seeking a serious challenge.
The komoot community highly rates the road cycling experience in Sierra Azul Open Space Preserve, with an average score of 4.6 stars. Reviewers often praise the challenging climbs, the stunning panoramic views from peaks like Mount Umunhum, and the sense of wilderness despite being close to urban areas. The diverse landscapes and quiet roads are frequently highlighted as major draws.
Yes, the preserve's diverse habitats, including grasslands, chaparral, and oak woodlands, support abundant wildlife. While cycling, you might spot deer, various bird species, and occasionally bobcats or coyotes. Remember to maintain a respectful distance and observe from afar.
Many of the routes in Sierra Azul Open Space Preserve are designed as loops, allowing you to start and end at the same point without retracing your path. For example, the Roadbike loop from Lexington Reservoir County Park is a popular moderate circular option.


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