Rancho San Antonio Open Space Preserve
Rancho San Antonio Open Space Preserve
By Fede from komoot
·
Updated May 29, 2026
If you've ever tried to plan road cycling in Rancho San Antonio Open Space Preserve, you know how quickly the options can become overwhelming. With so many trails, it's tough to tell which routes are genuinely worth your time and effort, and which are just filler. That's where komoot comes in. Our community has meticulously mapped, ridden, and reviewed these routes, so we've done the legwork to bring you a curated shortlist of the very best.
Road cycling here is a true Bay Area gem, offering a fantastic mix of rolling hills, open grasslands, and serene wooded canyons across its more than 4,000 acres. You'll find everything from gentle inclines to demanding climbs, with views stretching towards the Santa Cruz Mountains. The preserve's extensive network of over 25 miles of trails provides diverse experiences for all levels.
If you only do one route, we'd point you straight to the challenging Alpine Road Loop, a substantial 57.2 miles (92.0 km) with significant elevation gain that rewards you with panoramic views. For another epic ride, the Stevens Creek Reservoir – Skyline Boulevard loop from Rancho San Antonio County Park, at 67.4 miles (108.5 km), traverses ridge lines for expansive vistas. With more than 8,000 road cyclists having explored these routes with komoot, you can trust you're in good company.
Trail | Distance | Elevation | Difficulty |
|---|---|---|---|
| Alpine Road Loop | 92.0 km | 1,830 m | Hard |
| Stevens Creek Reservoir – Skyline Boulevard loop from Rancho San Antonio County Park | 109 km | 2,280 m | Hard |
| Old Page Mill Road – Arastradero Lake loop from Mountain View | 25.2 km | 240 m | Moderate |
| Junipero Serra Boulevard – Palo Alto-Los Altos Bike Path loop from Loyola Corners | 33.6 km | 170 m | Moderate |
| Adobe Creek – Elena Road Viewpoint loop from Loyola Corners | 38.0 km | 360 m | Moderate |
| Palo Alto-Los Altos Bike Path – Moffett Boulevard Bike Bridge loop from Bayshore/NASA | 45.1 km | 620 m | Moderate |
| Moffett Boulevard Bike Bridge – San Tomas Aquino Creek loop from Loyola Corners | 45.1 km | 100 m | Moderate |
| Adobe Creek – Los Altos Entrance Sign loop from Monta Vista High School | 24.0 km | 300 m | Moderate |
| Adobe Creek loop from Rancho San Antonio County Park | 19.4 km | 250 m | Easy |
| Los Altos Entrance Sign – Lincoln Park loop from Rancho San Antonio County Park | 20.2 km | 150 m | Easy |
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92.0km
05:05
1,830m
1,830m
The Alpine Road Loop is a challenging road cycling route that winds through the stunning Uinta-Wasatch-Cache National Forest, offering a demanding experience for seasoned cyclists. You'll navigate steep hills and switchbacks, particularly on the initial
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109km
05:56
2,280m
2,280m
The Stevens Creek Reservoir – Skyline Boulevard loop from Rancho San Antonio County Park is a demanding road cycling route that offers a diverse journey through Santa Clara County's natural beauty. You'll start in suburban settings, transition to the lush, curvy Stevens Canyon Road with glimpses of the creek, and then climb past wineries on Mount Eden Road. The highlight is Skyline Boulevard, which traverses a ridge with partially open views, though it can surprise you with short, extra-steep sections up to 18% grade.
This is a difficult 67.4-mile (108.5 km) ride with a substantial 7482 feet (2280 metres) of elevation gain, typically taking around 5 hours and 55 minutes to complete. It's classified as a hard road ride requiring very good fitness. The route is popular, so expect some traffic, especially quarry trucks on Stevens Canyon Road. Most surfaces are well-paved, but be aware that some segments might be unpaved.
This loop is the most popular road cycling route starting from Rancho San Antonio County Park, showcasing the varied natural beauty of the region, from reservoir views to ridge-top panoramas. The Stevens Creek Reservoir itself is an 87-acre body of water within a 1,063-acre park, providing a prominent scenic feature. The route offers access to an expansive natural environment for cyclists to explore, making it a significant endurance challenge in the Bay Area.
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25.2km
01:13
240m
240m
The Old Page Mill Road – Arastradero Lake loop offers a dynamic road cycling experience, transitioning from urban approaches to the sustained climb of Page Mill Road, where you'll find sweeping views of Silicon Valley. As you continue, the route winds through the Arastradero Preserve, showcasing rolling hills, oak woodlands, and the tranquil Arastradero Lake, which can be quite dry in summer. This moderate 15.7 miles (25.2 km) ride, with 793 feet (242 metres) of elevation gain, provides a diverse blend of challenging ascents and natural beauty, typically completed in about 1 hour and 12 minutes.
Starting from Mountain View, this cycling route is easily accessible for local riders. While Page Mill Road is paved, be aware that some sections within Arastradero Preserve, particularly near Arastradero Lake, might feature unpaved or mixed surfaces, which could be challenging for a road bike. No specific permits or fees are mentioned, but it's always wise to check local regulations. Consider an early morning start to avoid peak traffic and enjoy the cooler temperatures, especially during warmer months.
This route stands out for its combination of an iconic Bay Area climb and the rich biodiversity of Arastradero Preserve. Page Mill Road is a popular training ground for cyclists, known for its significant elevation changes. The preserve itself is a haven for wildlife, including deer and various bird species, offering a peaceful contrast to the strenuous climb. It's a fantastic way to experience the varied landscapes of the Santa Cruz Mountains and the natural beauty close to urban centers.
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33.6km
01:24
170m
170m
This road cycling loop offers a pleasant journey through varying landscapes, perfect for a relaxed yet engaging ride. You'll cruise along well-maintained paths and dedicated bike lanes, enjoying a mix of suburban views and open, rolling terrain. The Palo Alto-Los Altos Bike and Pedestrian Path, also known as the Hetch Hetchy Trail, is a highlight, connecting you to local parks like Bol Park, where you might even spot some donkeys. It's a moderate 20.9-mile (33.6 km) route with 554 feet (169 metres) of elevation gain, typically taking about 1 hour and 23 minutes.
To begin your adventure, head to Loyola Corners, a common starting point for local cycling routes. While specific parking information isn't always detailed, it's a well-known access point. The area is also reachable by public transport, offering flexibility for your travel plans. This loop is generally enjoyable throughout the year, but consider a morning ride to make the most of the dedicated bike lanes and multi-use paths.
Beyond the ride itself, this route connects to a broader network of Bay Area trails, including sections that follow the historical path of the abandoned Vasona Branch of the Southern Pacific Railroad. There are ongoing efforts to enhance bike lanes on Junipero Serra Boulevard, including the addition of protected sections, which speaks to the region's commitment to cyclist safety and comfort. It's a great option for family-friendly road cycling in the Palo Alto and Los Altos area.
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38.0km
01:43
360m
360m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
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45.1km
02:15
620m
620m
This moderate 28.0-mile (45.1 km) road cycling loop, with 2019 feet (615 metres) of elevation gain, offers a diverse ride that typically takes about 2 hours and 15 minutes. You'll experience a mix of well-maintained paved paths, like the Palo Alto-Los Altos Bike Path, and sections with gravel and crushed shell surfaces near the San Francisco Bay. Expect pleasant views of local parks, the Barron Park Donkeys, and opportunities for birdwatching in the tidal marshlands.
Starting from the Bayshore/NASA area, this route is generally accessible, though some unpaved sections near the Bay might get muddy after rain. Palo Alto is a Gold-Level Bicycle Friendly Community, ensuring good cycling infrastructure. The Moffett Boulevard Bike Bridge is a notable safety feature, providing a direct connection over a busy thoroughfare.
The loop connects several significant trail systems, including parts of the San Francisco Bay Trail and the Stevens Creek Trail. It offers a unique blend of natural beauty and access to the NASA Ames Research Center, showcasing the region's commitment to cycling. This route is a great option for road cyclists looking for varied scenery and a well-supported ride.
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45.1km
02:07
100m
100m
The Moffett Boulevard Bike Bridge – San Tomas Aquino Creek loop from Loyola Corners offers a unique blend of Silicon Valley's urban landscape and the tranquil beauty of the San Tomas Aquino Creek. As you cycle, you'll pass by notable landmarks like California's Great America amusement park and Levi's Stadium, while also enjoying views of the waterway and spotting wildlife such as herons and egrets in the marshy wetlands. The route is predominantly flat and paved, making it an easy and scenic road cycling experience.
This moderate 28.0-mile (45.1 km) loop, with a gentle 338 feet (103 metres) of elevation gain, typically takes around 2 hours and 6 minutes to complete. Starting from Loyola Corners, the trail is well-maintained and features underpasses for safe crossings, connecting to the broader San Francisco Bay Trail system. It's an excellent choice for a relaxed ride any time of year, though spring and fall provide ideal weather conditions.
This route is a fantastic way to experience the South Bay's cycling infrastructure, linking the San Tomas Aquino Creek Trail with the Moffett Boulevard Bike Bridge. It's popular with both commuters and weekend riders, offering a strategic connection between residential and industrial areas. The diverse scenery, from tech campuses to Bay views and distant mountains, makes it a rewarding ride for those seeking an accessible cycling adventure.
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24.0km
01:13
300m
300m
This road cycling loop, starting from Monta Vista High School, offers a diverse ride that transitions from suburban streets to the tranquil bayside marshlands of the Adobe Creek Loop Trail. You'll experience the flat, multi-use paths winding along Adobe Creek, Charleston Slough, and Matadero Creek, where you can spot a variety of waterfowl and unique art installations like "The Pole Field." The scenery shifts from urban to open, protected wetlands, providing a refreshing escape.
Planning your ride, expect a moderate 14.9-mile (24.0 km) journey with about 987 feet (301 metres) of elevation gain, which you can complete in roughly 1 hour and 13 minutes. The initial leg from Monta Vista High School involves navigating city streets, so be prepared for some rolling hills before reaching the flatter baylands. Parking at the high school might require checking for local event schedules or school hours.
This route is an excellent choice for road cyclists looking for a moderate challenge that combines urban riding with natural beauty, especially if you enjoy birdwatching. The Adobe Creek Loop Trail itself is a segment of the extensive San Francisco Bay Trail, highlighting its significance as a regional cycling and walking path. It's a great way to experience the unique ecosystem of the baylands, a prime location for observing diverse wildlife.
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19.4km
01:05
250m
250m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
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20.2km
00:57
150m
150m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
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A sculpture made by Augustin Rodnin
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The Palo Alto-Los Altos Bike and Pedestrian Path, also known as the Hetch Hetchy Trail, is a well-maintained multi-use route that connects Los Altos Avenue to Arastradero Road. It’s popular for biking, running, and hiking, offering scenic views and access to parks like Terman Park, Bol Park, and Barron Park Donkeys. The trail includes a mini library and is part of Henry M. Gunn High School's recommended walking routes.
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Big Basin Redwoods State Park has reopened for limited day use following the 2020 CZU Lightning Complex Fire. Visitors can explore trails like Redwood Loop and Meteor Trail, where resilient redwoods stand alongside new growth. Parking is $6 per vehicle with a $2 reservation fee or $10 without reservations. Rancho del Oso, the park’s coastal area, requires no reservations or fees. Dogs, horses, and mountain bikes are welcome in designated areas, while drones are prohibited. Road biking is allowed on all roads.
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Stevens Creek Reservoir spans 87 acres and is surrounded by a 1,063-acre park. Visitors can enjoy hiking, horseback riding, picnicking, and limited fishing. Seasonal boating for low-power boats is available from mid-April to mid-October. The park is open daily from 8 a.m. to sunset, with vehicle entry fees collected year-round at the Chestnut Parking Lot. Visitors can explore natural beauty and historic remnants like the Villa Maria orchard.
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This winding side road is very lightly trafficked and carries you between Stanford and the Palo Alto hills with partial shade the entire way. On the east side of the road you will find Frenchman's Tower, and old brick landmark.
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Charming bridge crossing Seven's Creek Boulevard at the north end of Creekside Park. Nearby, you’ll find the historic Stocklmeir Farmhouse in Blackberry Farm Park.
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From Elena Road, you’ll be treated to breathtaking views of the bay and surrounding hills. The vantage point offers a peaceful scene of the landscape, showcasing the natural beauty of the Bay Area.
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There are over 170 road cycling routes available in Rancho San Antonio Open Space Preserve, catering to various skill levels and preferences.
Yes, Rancho San Antonio Open Space Preserve offers a good selection of routes for beginners. Approximately 80 easy routes are available, providing gentler terrain for those new to road cycling or looking for a relaxed ride.
For experienced riders seeking a challenge, the preserve features about 20 difficult routes. Notable options include the Alpine Road Loop, a 57.2-mile route with substantial elevation gain, and the Stevens Creek Reservoir – Skyline Boulevard loop, which traverses ridge lines offering expansive vistas.
Road cycling in Rancho San Antonio Open Space Preserve is characterized by rolling hills, open grasslands, and wooded canyons. You'll find varied terrain with elevations ranging from gentle inclines to significant climbs, often providing views towards the Santa Cruz Mountains.
Yes, many routes offer scenic views. You can find highlights such as High Meadow Vista Point and View of San Francisco Bay from Upper High Meadow Trail. Some routes also pass by prominent natural features like Black Mountain.
The preserve is generally enjoyable year-round, but spring and fall offer the most pleasant conditions with mild temperatures and vibrant landscapes. Summers can be warm, especially in the open areas, while winters are typically mild but may bring occasional rain.
Yes, many road cycling routes in Rancho San Antonio are designed as loops. For example, the Altamont Road Vineyard – Elena Road Viewpoint loop offers a moderate 19.2-mile ride, and the Junipero Serra Boulevard – Palo Alto-Los Altos Bike Path loop is a popular 22.4-mile option.
The routes in Rancho San Antonio Open Space Preserve are highly rated by the komoot community, with an average score of 4.6 stars from over 300 reviews. Cyclists frequently praise the varied terrain, panoramic views, and the sense of natural escape the preserve offers.
Yes, parking is available at various access points and trailheads around Rancho San Antonio Open Space Preserve. Specific parking details can often be found on individual route pages on komoot or on the preserve's official website.
While the preserve itself is primarily natural open space, you'll find cafes and amenities in the nearby towns and communities surrounding Rancho San Antonio, such as Los Altos and Cupertino, which are easily accessible from many routes.
Route durations vary significantly based on distance and difficulty. An easy route might take less than an hour, while more challenging and longer routes, like the Alpine Road Loop, can take around 5 hours to complete.
Rancho San Antonio Open Space Preserve is home to various wildlife, including deer, coyotes, and a wide array of bird species. While road cycling, you have a good chance of observing local fauna, especially during quieter times of the day.
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