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United States
California
Marin County

Lucas Valley-Marinwood

The best gravel rides around Lucas Valley-Marinwood

4.7

(16)

291

riders

30

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.

Best gravel bike trails around Lucas Valley-Marinwood

  • The most popular gravel bike trail is Alpine Dam – Alpine Lake loop from Sleepy Hollow, a 40.5 miles (65.2 km)…

Last updated: July 9, 2026

4.0

(2)

36

riders

#1.

Alpine Dam – Alpine Lake loop from Sleepy Hollow

65.9km

04:42

1,010m

1,010m

The Alpine Dam – Alpine Lake loop from Sleepy Hollow is a crown jewel among Marin County gravel biking routes, offering an incredible journey through varied landscapes. You'll wind through…

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Hard

This Bay View Trail – China Camp State Park Village loop offers a diverse gravel biking experience, taking you through lush forests, peaceful meadows, and tidal wetlands with frequent glimpses…

Hard
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Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate
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Popular around Lucas Valley-Marinwood

Bay Area Ridge Trail β€” Hiking the backbone of The Bay

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Bay Area Ridge Trail β€” Hiking the backbone of The Bay

Hiking Collection by

Andrus

Tips from the Community

Andrus
May 26, 2025, Alpine Dam

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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Andrus
May 25, 2025, Alpine Lake

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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Alex
May 19, 2025, 680 Trail

The 680 Trail in Marin County has access points at the end of Manuel T. Freitas Parkway via the Mission Pass Bike Path and Fawn Drive. The terrain is fun, rolling trails.

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The park pays homage to a 19th-century fishing village of Chinese immigrants who harvested shrimp from the bay. Much of the village has been preserved, and for a couple bucks you can pay to enter and explore the old town and pier.

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Steep heading West can have traffic on SFD

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Matthew
February 14, 2024, Loma Alta Summit

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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Opening this bike tunnel through the renovated trail tunnel as part of the 2010 redeveloped rail connection from Larkspur Ferry to Santa Rosa closed a crucial gap in the bike commute to San Francisco.

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Frequently Asked Questions

How many gravel bike trails are available in Lucas Valley-Marinwood?

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.

Are there easy gravel bike trails suitable for beginners in Lucas Valley-Marinwood?

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.

Are there challenging gravel bike routes for experienced riders in Lucas Valley-Marinwood?

Absolutely. Lucas Valley-Marinwood features 11 difficult gravel bike routes, often involving significant elevation gain. For example, the Fish Gulch trail junction – Hoo-Koo-E-Koo Fire Road Trail loop from Fairfax is a challenging 24.6-mile ride with substantial climbing.

What is the best time of year for gravel biking in Lucas Valley-Marinwood?

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.

What are the trail conditions like after rain in Marinwood?

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.

Can I find loop gravel bike trails in Lucas Valley-Marinwood?

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 – Fish Gulch trail junction loop from Fairfax, which offers varied terrain and scenic views.

Are there any long-distance gravel routes near Lucas Valley-Marinwood?

For those seeking longer rides, the region offers several options. The Alpine Dam – 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.

Where can I find gravel bike trailheads with parking in Lucas Valley-Marinwood?

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.

What can I see along the gravel bike trails in Lucas Valley-Marinwood?

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.

Are there family-friendly gravel bike trails in Lucas Valley-Marinwood?

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.

What do other gravel bikers enjoy most about the trails here?

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 – Alpine Lake - Bon Tempe Dam loop from Fairfax.

Are there any less crowded gravel biking options in Lucas Valley-Marinwood?

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 – Big Rock Ridge loop from Fairfax, can offer a more secluded experience.

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