4.5
(22)
518
riders
36
rides
Gravel biking in Camino Alto Open Space Preserve offers a network of multi-use trails across 170 acres in Mill Valley, California. The preserve features wide fire roads, providing a mix of nearly flat stretches and moderately steep inclines. Riders can experience diverse terrain, from grasslands to oak and bay woodlands, with stands of redwood and Douglas fir. Panoramic views of the San Francisco Bay Area, including the city skyline and Mount Tamalpais, are visible from various points along the routes.
โฆLast updated: May 3, 2026
8
riders
38.1km
03:43
1,190m
1,190m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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.

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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.
5.0
(1)
59
riders
32.9km
02:23
570m
570m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
18
riders
20.5km
01:49
540m
540m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Arrival of the magnificent Golden Gate crossing
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Good vantage point.
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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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A nice place, but the bike parking fee and the price of an ice cream are a complete rip off!
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Pantoll Road is a beautiful, mostly paved route through Mount Tamalpais State Park, connecting the Panoramic Highway to Ridgecrest Boulevard. It winds closely along the curves of the hillside, with some shade from the trees in some spots. There are fantastic views along the way of San Francisco and the Marin Headlands, with incredible viewpoints over the Pacific coastline.
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This tidal sanctuary runs along the Mill Valley-Sausalito Pathway and the Charles F. McGlashan Pathway. More than 400 species of migratory birds rest here after their long flights, and if you pass through in the early morning or late evening, the sunrises and sunsets reflect beautifully on the surface of this 106-acre marsh.
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Beautiful spot next to Cavallo point that is a bit less busy than the very popular viewpoint up the hill.
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There are over 40 gravel bike trails in Camino Alto Open Space Preserve. These routes offer a diverse range of experiences, from moderately challenging climbs to more relaxed excursions on wide fire roads.
The trails in Camino Alto Open Space Preserve offer a mix of challenges. You'll find routes with moderately steep inclines, as well as more demanding options with significant elevation changes. While there are 11 moderate routes, the majority, 31 routes, are considered difficult, providing rewarding climbs for experienced riders. For example, the Lagunitas Trail loop from Corte Madera is a difficult route featuring substantial elevation changes.
Gravel biking in Camino Alto Open Space Preserve offers breathtaking panoramic views. From various points along the trails, you can see the San Francisco skyline, the Bay Bridge, and even the distant peaks of Mount Diablo. Stellar views of Mount Tamalpais are also a consistent highlight on many routes.
The preserve boasts a rich variety of habitats. You'll ride through grasslands, oak and bay woodlands, and stands of redwood and Douglas fir. Coast live oaks, madrone, California bay, toyon, and coyote brush are prevalent, contributing to the preserve's lush feel. Sheltered areas also feature redwoods and California bay trees.
Yes, the preserve's network largely consists of wide fire roads ideal for gravel biking. Notable examples include Escalon Fire Road, Middle Summit Fire Road, and Camino Alto Fire Road. These multi-use trails provide varying levels of challenge, from nearly flat stretches to moderately steep inclines.
Yes, several points of interest enhance the riding experience. You can explore sections like Camino Alto Road, the Middle Summit / Escalon Fire Road, and the Camino Alto OSP - Fire Road Trailhead. The Bob Middagh Trail also offers a unique experience.
Absolutely. Camino Alto serves as an excellent staging area for longer rides. It connects to adjacent preserves like Blithedale Summit and Horse Hill Open Space Preserve, allowing you to incorporate it into extensive gravel routes that explore the broader Marin County area, including connections to Mount Tamalpais.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 15 reviews. Reviewers often praise the diverse terrain, stunning panoramic views of the San Francisco Bay Area, and the well-maintained network of fire roads that make for an engaging gravel biking experience.
Yes, many of the gravel bike routes in Camino Alto Open Space Preserve are designed as loops. For example, the Pantoll Road loop from Mill Valley and the Marincello Trail โ Sausalito โ Mill Valley Path loop from Alta are popular options that allow you to start and finish in the same location.
Yes, Camino Alto Open Space Preserve is known for being dog-friendly, making it a popular spot for local residents and their canine companions. Many of the multi-use trails are suitable for dogs, but always ensure they are on a leash and follow preserve regulations.
Yes, Camino Alto is considered an ideal neighborhood preserve with ample parking available, particularly at the Escalon trailhead, providing easy access to the trail network.
While not directly within the main gravel biking fire roads, the Dawn Falls Trail, which can be accessed from the preserve, offers a pleasant redwood forest experience along Larkspur Creek, leading to seasonal waterfalls. This could be a nice addition to a gravel ride if you're looking for a short hike.


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