4.6
(273)
2,535
riders
81
rides
Mountain biking around Lucas Valley-Marinwood traverses a landscape characterized by rolling hills, expansive open meadows, and diverse oak woodlands. The region features a network of trails that combine singletrack sections with wider fire roads, offering varied terrain. A prominent natural feature is Big Rock Ridge, which provides extensive views and is the second-highest point in Marin County. Riders can expect to encounter both evergreen and deciduous oaks throughout the area.
Last updated: April 25, 2026
4.8
(4)
28
riders
43.3km
04:46
1,450m
1,450m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
5.0
(4)
32
riders
16.5km
01:33
380m
380m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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4.7
(7)
31
riders
14.1km
01:25
370m
370m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(1)
12
riders
10.9km
01:15
370m
370m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
8
riders
19.6km
02:06
620m
620m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Popular around Lucas Valley-Marinwood
At the junction of Chicken Shack Fire Road and Ponti Ridge Trail. There are benches, a great view, and trail markers.
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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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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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Big Rock Ridge, a striking ridge near Novato, California, standing as Marin County's second-tallest peak. Spanning 5 miles from northwest to east, it creates a natural boundary for central and southern Marin County. Named after the rock at the base of Big Rock Trail, this ridge promises awe-inspiring views and invigorating trails.
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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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Highest point on Big Rock Ridge Fire Road with panoramic views of the Bay, Marin county, and even across the East bay to Mt. Diablo and south to San Francisco. A short spur trail here leads to a point with slightly better views down over Skywalker Ranch and the Lucas Valley.
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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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Lucas Valley-Marinwood offers a wide selection of mountain bike trails, with over 90 routes available. These range from easy to difficult, ensuring options for various skill levels.
The region is generally pleasant for mountain biking throughout much of the year. Spring brings vibrant wildflowers, while clear days offer spectacular views from high points like Big Rock Ridge. Always check local conditions, especially after rain, as some trails may be affected.
Yes, there are several options suitable for families. The area features 13 easy-rated routes, which are often less challenging and can be a good starting point for family outings. While specific family-designated trails aren't listed, routes with less elevation gain and wider paths would be ideal.
Many trails in Marin County Open Space Preserves, which include parts of Lucas Valley-Marinwood, allow dogs. However, specific rules regarding leashing and waste removal apply. It's always best to check the Marin County Parks regulations for the specific trail you plan to ride to ensure compliance.
The trails in Lucas Valley-Marinwood are characterized by rolling hills, expansive open meadows, and diverse oak woodlands. You'll find a mix of fun singletrack sections and wider fire roads, offering varied terrain and experiences. Routes like the Mountainbike loop from Marinwood offer a moderate experience through this landscape.
Absolutely. Lucas Valley-Marinwood has 30 difficult-rated routes for experienced riders. For example, the 680 Trail loop from Fairfax is known for requiring good fitness and advanced riding skills, navigating varied and demanding terrain.
A significant natural feature is Big Rock Ridge, which offers spectacular, nearly 360-degree views on clear days, including Mount Burdell, the Golden Gate, and San Francisco. You can also spot the edge of Tomales Bay and even George Lucas's Skywalker Ranch from some vantage points. The area is also rich in diverse oak woodlands and vibrant wildflowers in spring.
Access points and parking vary by trail. Many trailheads within the Lucas Valley Open Space Preserve and surrounding areas offer designated parking. It's advisable to check specific route details on komoot or local park websites for the most accurate parking information for your chosen trail.
While Lucas Valley-Marinwood is primarily residential with open spaces, there are cafes and restaurants in nearby communities like Novato and Fairfax. These towns offer various dining options, some with outdoor seating, perfect for a post-ride meal or coffee.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 260 reviews. Riders often praise the diverse landscapes, the mix of singletrack and fire roads, and the stunning views, especially from Big Rock Ridge. The variety of routes catering to different skill levels is also a frequently highlighted positive aspect.
Generally, permits are not required for individual riders on most public trails in the Lucas Valley-Marinwood area, which falls under Marin County Open Space Preserves. However, it's always good practice to verify current regulations with Marin County Parks, as rules can change.
Public transportation options, such as Golden Gate Transit and Marin Transit buses, serve areas around Lucas Valley-Marinwood. Some routes may have bike racks, allowing access to trailheads. Checking specific bus routes and their proximity to trail access points is recommended for planning your trip.


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