4.7
(88)
2,392
riders
140
rides
Touring cycling in Sierra Azul Open Space Preserve offers routes through diverse landscapes within the Santa Cruz Mountains. The preserve features significant elevation changes, extensive multi-use trails, and open spaces. Cyclists can navigate winding paths and challenging climbs, connecting natural areas and reservoirs. The terrain includes hills, chaparral, oak woodlands, and riparian corridors, providing varied cycling experiences.
Last updated: June 26, 2026
16
riders
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
14
riders
10.8km
01:23
480m
480m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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5.0
(2)
25
riders
83.6km
05:40
1,410m
1,410m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
19
riders
71.4km
04:45
1,110m
1,110m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
13
riders
59.4km
04:19
1,230m
1,230m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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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!…
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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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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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The Mount Umunhum Trailhead offers some amenities, including bathrooms at both the start and summit. With parking available for about 20 cars, this trail provides great views and is a great spot for sunsets. Aim to hike early in the morning or in the evening as it can get very hot in the summer.
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From the top of the dam you get splendid views out across Lexington Reservoir. To the north you overlook the winding end of the Los Gatos Creek Trail, which connects to the Jones Trail across from the restroom just up the road. The dam itself was constructed in 1952 and stands at nearly 200 feet tall.
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The Kennedy Road Sierra Azul Trailhead has a small parking area that fits about three cars, depending on size, and offers a shaded starting point. A portable toilet is available at the trailhead, and additional parking can be found at the top of Top of the Hill Road.
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At the summit of Mt Umunhum is an 8 story tower that was used as a radar outpost by the US Air Force until 1980. In addition to this piece of military history you'll also find stunning views in all directions. On clear days you can see as far as San Francisco and Monterey.
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Sierra Azul Open Space Preserve offers over 150 touring cycling routes, catering to various skill levels. You'll find a diverse network of paths, from moderate to difficult, allowing you to explore the region's unique terrain.
Touring cycling in Sierra Azul Open Space Preserve is characterized by significant elevation changes and challenging climbs. While there are some moderate options, the majority of routes are considered difficult, with 54 difficult routes and 65 moderate routes out of 156 total. Cyclists should be prepared for demanding ascents and descents.
While many routes feature challenging climbs, there are 37 routes categorized as easy, offering less strenuous options for those new to touring cycling or looking for a more relaxed ride. These routes still provide a taste of the preserve's natural beauty without the intense elevation gains.
Experienced touring cyclists will find ample challenges in Sierra Azul Open Space Preserve. Routes like Mount Umunhum Road – Mount Umunhum loop from Almaden Quicksilver County Park and Bike loop from Heintz Open Space feature substantial climbs and descents, offering panoramic views and a rigorous workout.
Yes, many touring cycling routes in Sierra Azul Open Space Preserve are designed as loops, allowing you to start and end at the same point. For example, the popular Capitola Village – Mountain Charlie Road loop from Lexington Reservoir County Park offers a diverse journey through various landscapes.
The routes in Sierra Azul Open Space Preserve offer expansive views of the Santa Clara Valley, scenic reservoir vistas, and extensive open spaces. You'll often find yourself on winding paths traversing hills, providing numerous opportunities for panoramic outlooks.
Along the touring cycling routes, you can explore various points of interest. Notable climbs include Mount Umunhum Road and Hicks Road Climb. You might also encounter trailheads like Kennedy Road Sierra Azul Trailhead and natural areas such as Sierra Azul Open Space itself.
The preserve is generally accessible year-round, but spring and fall often offer the most pleasant conditions with milder temperatures. Summers can be hot, especially on exposed sections, while winters might bring rain, making some trails muddy. Always check local weather forecasts before heading out.
While many routes are challenging, families can find suitable options among the 37 easy-rated routes. These paths typically have less elevation gain and are shorter, providing a more relaxed experience for cyclists of all ages. Always check the route details for specific difficulty and length before embarking with children.
The touring cycling routes in Sierra Azul Open Space Preserve are highly rated by the komoot community, with an average score of 4.7 stars from over 90 reviews. Cyclists frequently praise the challenging hill climbs, the rewarding scenic reservoir views, and the extensive open spaces that define the area's unique character.
Sierra Azul Open Space Preserve is home to diverse wildlife. While cycling, you might encounter deer, various bird species, and smaller mammals. Staying quiet and observant, especially during dawn and dusk, increases your chances of spotting local fauna. Remember to maintain a respectful distance.
While the preserve itself is largely undeveloped, you'll find towns and communities bordering Sierra Azul Open Space Preserve, such as Los Gatos and Almaden Valley, which offer various cafes, restaurants, and stores for refueling and refreshments before or after your ride.


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