4.6
(25)
538
riders
32
rides
Gravel biking in King Mountain Open Space Preserve offers a network of multi-use trails and fire roads across 193 acres. The terrain includes shaded mixed woodlands, sunny grasslands, and redwood canyons, providing varied riding conditions. Riders can expect both gentle climbs and more challenging sections with significant elevation gain. The preserve features diverse natural environments suitable for gravel bikes.
Last updated: July 10, 2026
9
riders
20.2km
01:32
460m
460m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.8
(6)
73
riders
47.4km
04:21
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)
28
riders
45.1km
03:18
770m
770m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
41
riders
36.3km
02:34
510m
510m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
19
riders
24.9km
01:45
360m
360m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around King Mountain Open Space Preserve
Batterij Townsley is a place where nature and history meet. As you climb along the rugged cliffs of the Marin Headlands, the old coastal defense slowly emerges from the landscape. Once at the top, a panorama opens up that will leave you speechless: the Pacific Ocean, the Golden Gate Bridge, and the endless horizon. The abandoned bunkers and tunnels give the place a mysterious atmosphere, as if time has stood still here. A perfect stop to enjoy, wander, and completely immerse yourself in the view.
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An absolute must-see for cycling enthusiasts! This museum in Fairfax tells the story of nearly 200 years of cycling history, from 19th-century velocipedes to modern racing bikes. It's also home to the Mountain Bike Hall of Fame, featuring unique specimens and stories about the pioneers of mountain biking. The collection is impressive and authenticβno replicas, but real bicycles that showcase the evolution of technology and design. An inspiring place where you can truly feel the passion for cycling.
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Part of the coastal defenses along Coastal Trail, latest remnants here date from the WW II and early cold war era.
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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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Mount Tamalpais State Park is a majestic area in the heart of Marin County, with sweeping hillsides covered in fantastic redwood forest, open grasslands, sturdy chaparral, and wooded oaklands. The views from Mount Tampais boast breathtaking vistas of the Pacific Ocean, San Francisco Bay and City, the Marin County Hills, Mount Diablo, and the East Bay. You can even see the Farallon Islands, 25 miles out to sea. If you're lucky, you can catch an occasional glimpse of the snow-capped Sierra Nevada Mountain Range, nearly 150 miles away. The Park is a haven for cyclists, hikers, wildlife watchers, or those who wish to find a beautiful spot for an afternoon picnic.
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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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King Mountain Open Space Preserve offers a wide selection of routes, with over 30 dedicated no-traffic gravel bike trails. These range from moderate to difficult, ensuring a suitable challenge for various skill levels.
The preserve is renowned for its breathtaking panoramic views. From various points along the trails, you can take in expansive vistas of the San Francisco Bay, Mount Tamalpais, and the Richmond-San Rafael Bridge. The View from King Mountain is particularly spectacular.
Yes, the preserve showcases a rich tapestry of natural environments. You can traverse shaded mixed woodlands, sunny grasslands, and redwood canyons. After rainstorms, seasonal waterfalls are a highlight, with Dawn Falls Trail being a notable attraction. The trails also feature areas with chaparral and wildflowers in the spring.
Absolutely. While the guide focuses on moderate to difficult routes, the preserve features multi-use trails and fire roads that are well-suited for gravel bikes, encompassing both gentle climbs and more strenuous sections. For a challenging experience, consider the Lagunitas Trail loop from Corte Madera, which covers nearly 38 km with significant elevation gain.
The preserve is enjoyable year-round, but spring offers the beauty of wildflowers and lush greenery. After rainstorms, seasonal waterfalls like Dawn Falls are at their best. The varied terrain provides shaded sections for warmer days and open areas for cooler weather.
Yes, many of the no-traffic gravel bike trails in King Mountain Open Space Preserve are designed as loops. An excellent moderate option is the Phoenix Lake β Fish Gulch trail junction loop from Larkspur, offering a scenic ride without repeating sections.
The area is highly rated by the komoot community, with an average score of 4.5 stars. Reviewers often praise the diverse terrain, the stunning panoramic views of the Bay and Mount Tamalpais, and the peaceful, traffic-free nature of the trails, which allows for an immersive outdoor experience.
For experienced riders seeking a significant challenge, routes like the Old Mine Trail (lower) π² loop from Mill Valley offer nearly 47 km of riding with over 1200 meters of elevation gain, providing a demanding and rewarding experience.
Yes, the preserve connects to other natural areas. For example, the Blithedale Ridge Fire Rd π»π΅ is part of the Blithedale Summit Open Space Preserve, known for its mountain biking opportunities and great views, offering extended riding possibilities.
The terrain is diverse, featuring multi-use trails and fire roads. You'll encounter a mix of shaded mixed woodlands, sunny grasslands, and redwood canyons. The surfaces are generally well-suited for gravel bikes, ranging from packed dirt to some rockier sections, providing a varied and engaging ride.


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