4.8
(102)
1,488
hikers
85
hikes
Family friendly hiking trails in Loma Alta Open Space Preserve traverse a varied landscape of open grasslands, California bay woods, and oak woodlands. The preserve is characterized by rolling hills and canyons, with creekbeds adding topographical interest. From its 1,592-foot summit, hikers can experience panoramic views of Mount Tamalpais, the San Francisco Bay, and the East Bay hills. This area plays a role in regional hydrology, dividing four major watersheds.
Last updated: July 8, 2026
4
hikers
23.1km
07:04
770m
830m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.
12.2km
03:32
320m
310m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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6
hikers
14.2km
04:00
300m
290m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
11.1km
03:22
380m
360m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
8.32km
02:34
340m
310m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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Loma Alta literally translates to "high hill" and is the highest point in the Loma Alta Open Space Preserve. A few different dirt roads and trails lead to the bald summit that looks over the surrounding hillsides.
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Narrower waters often glow green/blue down here. Has a different feel to the rest of the lake.
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Embark on an adrenaline-fueled mountain biking adventure through Big Rock. The trail reaches its peak at the towering landmark, a colossal rock that adds a unique touch to the experience. Exercise caution on the descent; the pavement can get slippery, adding an exhilarating challenge to this thrilling ride.
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This cabin dates back to the 1890s and was originally a caretaker's home located on what was known as part of the ranch for the nearby Porteous Mansion. The cabin's construction comes from redwood logs cut from the Deer Park section of the ranch and the trim around the windows and doors from a fallen tree on the southwest side of Shaver Grade. It is an interesting piece of local history and the only structure of its kind in Marin County.
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There is plenty of street parking at this trailhead, with the amazing Big Rock nearby to make it easy to spot. The Bay Area Ridge Trail runs along the ridgelines surrounding the San Francisco Bay area and spans over 500 miles of multi-use trails. This portion offers some of the best views of Marin and the city skyline.
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With over 150 miles of trails, this junction leads to several choices, depending on how far you want to extend your hike. Shaver Grade Road is a gravel fire road that climbs gradually toward Bon Tempe Lake. Eldridge climbs steeply from here and swings south on a more gradual incline, which will take you to the top of Mount Tamalpais East Peak. Fish Grade will take you to Fish Gulch Trail, and Gertrude Ord Trail is a single track that runs along Phoenix Creek, around Phoenix Lake and connects to several other routes for miles of tremendous trails to explore.
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Phoenix Lake is open to the public for swimming and fishing. Dogs are allowed on the surrounding trails, but are not allowed to swim nor drink from the water.
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Loma Alta Open Space Preserve offers a wonderful selection of trails suitable for families. While the entire preserve features nearly 90 routes, you'll find over 30 easy and 40 moderate trails that are generally well-suited for family outings, providing diverse options for all ages and skill levels.
For a pleasant family loop, consider the White Hill, Hobo Camp, and Broken Dam Loop. It's a moderate route that offers varied scenery without being overly strenuous, perfect for an active family day out. Another option that connects to the wider network is the Bay Area Ridge Trail: Loma Alta - 680 Trail, which provides a good introduction to the preserve's diverse landscapes.
The preserve boasts diverse natural beauty. You'll encounter open grasslands that burst with wildflowers in spring, dense California bay woods, and woodlands dotted with white and coast live oaks. During the rainy season, you might even spot the two-tiered Fairfax Falls cascading into a rocky grotto. The varied topography, including canyons and creekbeds, adds to the scenic interest.
Absolutely! The 1,592-foot summit of Loma Alta offers truly panoramic, 'jaw-dropping' views that are worth the effort. From there, you can often see Mount Tamalpais, the San Francisco Bay, the Richmond/San Rafael Bridge, the East Bay hills, and even the San Francisco skyline on clear days. The Old Railroad Grade Trail is also a notable feature, providing a historical path through the landscape.
Spring is an ideal time for family hikes, as the woods are lush and wildflowers, including California poppies and lupines, are in vibrant bloom. However, the preserve is attractive year-round. Autumn offers beautiful golden light on the grassy hills, while winter and early spring can bring muddy conditions, especially after rain. Summer can be dry, so plan for sun protection and hydration.
Yes, Loma Alta Open Space Preserve is generally dog-friendly. Most trails allow dogs, but they must be kept on a leash to protect wildlife and ensure a pleasant experience for all visitors. Always remember to pack out any waste.
The komoot community highly rates Loma Alta Open Space Preserve, with an average score of 4.88 out of 5 stars. Reviewers often praise the diverse landscapes, the stunning panoramic views from the summit, and the extensive network of trails that cater to various skill levels. The opportunity to spot wildflowers and enjoy the tranquility of nature are frequently highlighted.
Yes, Loma Alta is well-connected to adjacent trail systems, making it a great starting point for longer adventures. It's an important link in the Bay Area Ridge Trail, which circles the entire Bay Area. The 680 Trail is a notable wooded singletrack that connects to other parts of the Marin County Open Space system, offering opportunities to extend your family's hike.
Parking is available at various trailheads around the preserve. Popular access points include the White Hill Trailhead and other designated areas. It's always a good idea to check specific trailhead information for the route you plan to take, as parking availability can vary.
The preserve is home to a variety of wildlife. The open grasslands are important breeding sites for horned larks and western meadowlarks, and you might spot western bluebirds nesting in forested canyons. Keep an eye out for various raptors hunting on the open slopes, offering excellent birdwatching opportunities for the whole family.
The Deer Park, Shaver Grade and Gertrude Ord Trail is a moderate option that provides a good blend of scenery and varied terrain, including woodlands and open areas. It's a great way to experience the diverse ecosystems of Loma Alta Open Space Preserve with your family.


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