4.6
(12)
231
riders
21
rides
Gravel biking around Lucas Valley-Marinwood offers a diverse landscape characterized by rolling hills, scenic valleys, and access to reservoirs and lakes. The region provides a mix of terrain suitable for gravel cyclists, from established fire roads to more technical paths. Elevations vary, presenting opportunities for both sustained climbs and gentler sections.
Last updated: April 27, 2026
4.0
(2)
35
riders
65.9km
04:42
1,010m
1,010m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
29
riders
45.1km
03:10
740m
740m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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3.0
(1)
9
riders
38.6km
03:35
950m
940m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
9
riders
52.5km
05:00
1,510m
1,500m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
7
riders
35.1km
02:34
440m
440m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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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 authenticโno 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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Constructed in 1917 this dam forms Alpine Lake, which sites between Kent and Bon Tempe Lakes. The road across the top of the dam make it a great place to ride on a loop around the lake.
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This lake was formed by the building of Alpine Dam in 1917. It sits between Kent Lake and Bon Tempe Lake, and is popular for a variety of outdoor activities.
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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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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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Steep heading West can have traffic on SFD
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Lucas Valley-Marinwood offers a wide selection of gravel biking opportunities, with over 25 routes available. These range from easy to difficult, catering to various skill levels.
Yes, there is at least one easy gravel bike trail available, and many of the moderate routes can also be suitable for beginners looking for a bit more challenge. The region's diverse terrain allows for a gradual progression in difficulty.
Absolutely. Lucas Valley-Marinwood features 11 difficult gravel bike routes, often involving significant elevation gain. For example, the Fish Gulch trail junction โ Hoo-Koo-E-Koo Fire Road Trail loop from Fairfax is a challenging 24.6-mile ride with substantial climbing.
The mild climate of Lucas Valley-Marinwood makes it suitable for gravel biking year-round. Spring and fall offer pleasant temperatures and lush scenery. Summers can be warm, so early morning rides are recommended, while winters are generally mild but can bring rain, affecting trail conditions.
After rain, some gravel trails, especially those on fire roads, can become muddy or have loose gravel. It's always best to check local trail conditions or recent komoot tour comments before heading out, as some areas may be temporarily closed or require more robust tires.
Yes, many of the gravel routes in Lucas Valley-Marinwood are designed as loops, allowing you to start and end at the same point. A popular option is the Phoenix Lake โ Fish Gulch trail junction loop from Fairfax, which offers varied terrain and scenic views.
For those seeking longer rides, the region offers several options. The Alpine Dam โ Alpine Lake loop from Sleepy Hollow is a substantial 40.5-mile route with significant elevation, perfect for a longer day out on the gravel bike.
Many popular trailheads in the Lucas Valley-Marinwood area, especially those near Fairfax, offer designated parking areas. It's advisable to check specific route details on komoot for parking information related to your chosen starting point.
The gravel trails often lead through scenic landscapes with access to beautiful natural features. You can explore areas around Phoenix Lake and Stafford Lake Park, or even pass by notable peaks like Big Rock Ridge, offering stunning views.
While many routes involve some climbing, there are options suitable for families, especially those with some biking experience. Look for routes with less elevation gain and wider, well-maintained fire roads. Always check the route's difficulty and terrain description before heading out with children.
The komoot community highly rates the gravel biking in Lucas Valley-Marinwood, with an average score of 4.8 stars. Riders frequently praise the diverse terrain, from rolling hills to forested sections, and the scenic routes around local lakes and reservoirs like those found on the Fairfax โ Alpine Lake - Bon Tempe Dam loop from Fairfax.
To find less crowded routes, consider exploring trails during off-peak hours or on weekdays. While popular routes can see more traffic, the extensive network of fire roads and less-traveled paths, such as the Fairfax โ Big Rock Ridge loop from Fairfax, can offer a more secluded experience.


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