4.5
(21)
511
riders
45
rides
Gravel biking in Blithedale Summit Open Space Preserve offers a network of fire roads and varied terrain on the northern flank of Mount Tamalpais. The preserve features diverse landscapes, including redwood and Douglas-fir forests, open grasslands, and dense chaparral. Riders can navigate accessible climbs and enjoy panoramic views of the Marin Headlands and San Francisco Bay from higher elevations. This area provides a combination of engaging fire roads and scenic natural beauty for gravel cyclists.
Last updated: May 3, 2026
4.8
(6)
79
riders
47.4km
04:24
1,270m
1,270m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
53
riders
37.7km
03:08
1,000m
1,000m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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18
riders
20.5km
01:49
540m
540m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
18
riders
20.8km
01:30
310m
310m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
8
riders
24.6km
01:48
440m
440m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Blithedale Summit Open Space Preserve
Mount Tam East Peak offers some of the most majestic views north of the bay. From this vantage point, you can see all of Marin, along with Point Reyes to the north and Oakland and San Francisco to the south. The stunning panoramic vistas make the journey well worth the effort. There are restrooms and picnic tables, ideal for a snack or lunch while you capture some incredible photos.
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West of Lake Lagunitas, Bon Tempe Lake is a reservoir managed by Marin Municipal Water District. It features striking scenery, with lush trees, clear water, and a peaceful atmosphere.
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West of Lake Lagunitas, Bon Tempe Lake is a reservoir managed by Marin Municipal Water District. It features striking scenery, with lush trees, clear water, and a peaceful atmosphere.
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At this point on Sky Oaks Road, there is a junction with Shaver Grade Road, which connects with a dense network of trails and dirt roads near Bald Hill in the Mount Tamalpais State Park. From here, you can continue on the paved Sky Oaks Road or go arond the gate on to the gravel Shaver Grade Road.
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This paved bike trail runs through the College of Marin Campus along the Corte Madera Creek. This is a great trail for students and commuters, as well as cyclists looking for a traffic-free shortcut through the area.
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Covered shelter hut, picnic tables, restroom, and parking.
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There are over 50 gravel bike routes in Blithedale Summit Open Space Preserve, offering a wide range of options for different skill levels. You'll find everything from moderate climbs to challenging, difficult routes.
The preserve features an extensive network of fire roads, which are ideal for gravel biking. These trails offer varied terrain, including dirt and gravel surfaces, and can range from relaxing climbs to more strenuous ascents. During winter, you might encounter seasonal streams and small waterfalls.
While many routes are rated moderate to difficult, the historic Old Railroad Grade is known for its easy, steady ascent, making it accessible for beginning cyclists and families. This path leads through towering redwoods, offering a scenic and less strenuous experience.
You'll experience diverse landscapes, including redwood and Douglas-fir forests, open grasslands, and dense chaparral. Keep an eye out for small redwood groves in hillside creases, especially where seasonal streams flow. During winter, you might even spot seasonal waterfalls like Dawn Falls.
From higher elevations within the preserve, cyclists can enjoy spectacular panoramic views of the Marin Headlands and San Francisco Bay. Jaw-dropping vistas stretch uphill towards Mount Tamalpais's East Peak and south past Mill Valley.
The preserve is easily accessible with multiple access points. While some parking is available, it can be limited in certain areas, especially during peak times. It's advisable to plan your visit accordingly.
The preserve offers enjoyable riding year-round. During winter, you'll find seasonal water features like waterfalls and streams. Spring brings blooming lilies in the cool canyons. The diverse forests and open areas provide a pleasant experience across seasons, though conditions can vary.
Yes, you can explore several notable points. The Dawn Falls Trail is a popular seasonal waterfall. You can also ride along sections like the Blithedale Ridge Fire Rd and Middle Summit / Escalon Fire Road, which are key parts of the trail network.
The routes in Blithedale Summit Open Space Preserve are highly rated by the komoot community, with an average score of 4.6 stars from over 16 reviews. Riders often praise the varied terrain, the scenic beauty of the redwood forests, and the panoramic views.
Yes, there are several loop options. For a challenging ride, consider the Pantoll Road loop from Mill Valley, which covers over 34 km. Another popular choice is the Railroad Grade Fire Road loop from Mill Valley, following a historic railway line.
Absolutely. The preserve is part of a larger trail system that connects to surrounding protected lands, including Baltimore Canyon, King Mountain, and Mount Tamalpais State Park. This connectivity allows for longer and more varied rides, and the Bay Area Ridge Trail also runs through the preserve.
While many routes are rated moderate to difficult, the preserve does offer some more accessible climbs. The historic Old Railroad Grade is particularly notable for its easy, steady ascent, making it suitable for those new to gravel biking or looking for a more relaxed ride.


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