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Gravel rides
United States
California
Marin County

Deer Island Open Space Preserve

The best gravel rides in Deer Island Open Space Preserve

5.0

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34

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Gravel biking in Deer Island Open Space Preserve offers routes through a landscape characterized by seasonal wetlands, open grasslands, and mixed oak woodlands. The preserve features a central hill providing some elevation change, with surrounding paths that traverse diverse natural features. While some trails are designated for hiking and equestrian use, the area includes unpaved sections and routes suitable for gravel bikes, offering varied terrain. These routes navigate through forests of native oaks and California bay, alongside views of Novato Creek and adjacent marshes.

Best gravel bike trails in Deer Island Open Space Preserve

  • The most popular gravel bike trail is Pinheiro Fire Road Trailhead – Bahia Trail loop from Novato Downtown, a 15.1 miles (24.3 km) trail that takes 1 hour 42 minutes to complete. This route offers a mix of terrain through open spaces and woodlands.
  • Another top favourite among local gravel bikers is Old Town Novato – Old Town Novato loop from Novato Downtown, a moderate 10.9 miles (17.5 km) path. This trail features varied elevation changes and passes through local points of interest.
  • Local gravel bikers also love the 680 Trail – Big Rock Ridge loop from Marinwood, a 16.5 miles (26.5 km) trail leading through diverse landscapes with significant elevation gain, often completed in about 3 hours 26 minutes.
  • Gravel biking in Deer Island Open Space Preserve is defined by mixed oak woodlands, open grasslands, and views of seasonal wetlands. The network offers options for easy, moderate, and difficult ability levels.
  • The routes in Deer Island Open Space Preserve are highly rated by the komoot community with an average score of 5.0 stars from over 2 reviews. More than 20 gravel bikers have used komoot to explore Deer Island Open Space Preserve's varied terrain.

Last updated: July 9, 2026

2

riders

#1.

Gravel loop from Novato Creek

18.0km

01:29

390m

390m

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

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Moderate

Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.

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Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.

Easy

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

Moderate

This Novato San Marin gravel biking route offers a delightful blend of smooth, paved multi-use paths and natural fire roads, making it an excellent choice for a varied ride. You'll start on the tree-lined SMART Multiuse Pathway, enjoying a comfortable surface before transitioning to the Pinheiro Fire Road. Here, the landscape opens up to scenic marsh and oak views within the Rush Creek Open Space, providing a more natural, open-space feel.

This easy 11.6-mile (18.7 km) loop, with a gentle 302 feet (92 metres) of elevation gain, is suitable for all skill levels and can typically be completed in about 1 hour and 22 minutes. It's a family-friendly option, and dogs are permitted on the Pinheiro Fire Road section. While generally accessible year-round, be aware that the unpaved sections of Pinheiro Fire Road can be bumpy or wet after rain.

The SMART Multiuse Pathway is part of a larger planned 70-mile trail system, connecting communities and offering both recreational and commuting options. The Pinheiro Fire Road, a popular multi-use trail, attracts not only gravel bikers but also horseback riders and hikers, highlighting its appeal as a diverse outdoor space in Marin County.

Easy

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Tips from the Community

Andrus
August 22, 2025, Pierre Joske Grove

Pierre Joske Grove offers hikers, mountain bikers, and equestrians a peaceful oak-shaded retreat amid sweeping grasslands. Sitting at roughly 800 feet elevation just off Deer Camp Fire Road, the grove’s mature oaks invite rest, birdwatching, and wildflower spotting in spring. It also serves as a community focal point for habitat restoration, most recently hosting milkweed planting events to support monarch butterflies.

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This is a small park with a 10-acre pond and some trails along the shore. There are usually quite a few birds around, you might even spot a large pelican from time to time.

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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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Andrus
January 15, 2024, Bahia Trail

This trail runs along the edge of the Petaluma River wetlands and is a popular multi-use trail, so keep an eye out for others on the trail. The wetlands are an important area for wildlife, and are currently undergoing habitat restoration to improve conditions for native plants & animals.

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Andrus
October 29, 2023, Bahia Trail

This trail runs along the edge of the Petaluma River wetlands and is a popular multi-use trail, so keep an eye out for others on the trail. The wetlands are an important area for wildlife, and are currently undergoing habitat restoration to improve conditions for native plants & animals.

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Traveler
October 29, 2023, Old Town Novato

The downtown area of Novato stretches along Grant Avenue, with the Old town from the Train Station west to Redwood Boulevard, and more recent development a couple blocks further west.

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The position of this vintage 1960s station wagon at the remote and roadless northern side of the Bahia is a fascinating mystery that can motivate creative story telling. The most plausible explanation might be that it was driven to the top of Bahia ridge when the preserve was still a mostly grass-covered ranchland, and somehow rolled down the hill and crashed. The trees that grew around it after grazing ended seem to be lifting the wreck up as they grow and grab the metal in various places with their bark.

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malami
December 20, 2022, Old Town Novato

My coffee stop on this ride is - Dr. Insomniac's Fine Coffee

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Frequently Asked Questions

What kind of terrain can I expect on gravel bike trails in Deer Island Open Space Preserve?

Gravel biking in Deer Island Open Space Preserve offers a diverse landscape. You'll encounter routes through mixed oak woodlands, open grasslands, and areas near seasonal wetlands. While some paths are unpaved, they provide a varied experience, navigating through forests of native oaks and California bay, often with views of Novato Creek and adjacent marshes.

Are there any beginner-friendly gravel bike trails in Deer Island Open Space Preserve?

Yes, there are options suitable for beginners. For instance, the Pinheiro Fire Road Trailhead – Bahia Trail loop from Novato Downtown is rated as easy and covers 15.1 miles (24.3 km) with minimal elevation gain, making it a good choice for those new to gravel biking in the area.

What are the typical distances and elevation gains for gravel bike routes in the preserve?

The gravel bike routes in Deer Island Open Space Preserve vary in length and elevation. You can find routes ranging from approximately 10.9 miles (17.5 km) to 16.5 miles (26.5 km). Elevation gains also differ, with some routes like the Pinheiro Fire Road Trailhead – Bahia Trail loop having around 135 meters of ascent, while more challenging options like the 680 Trail – Big Rock Ridge loop can feature over 1000 meters of elevation gain.

What natural features and viewpoints can I see along the gravel bike trails?

The preserve is rich in natural beauty. You'll ride through diverse woodlands featuring coast live oak, blue oak, black oak, and white oak, alongside California bay woods. Open grasslands transform with the seasons, and you can often spot seasonal wetlands and Novato Creek. From higher elevations, particularly along routes that climb, you can enjoy sweeping views to the west, as well as vistas of Novato Creek and the adjacent marshes.

Is Deer Island Open Space Preserve suitable for family-friendly gravel biking?

While the main Deer Island Loop Trail is designated for hikers and equestrians, the broader area offers cycling routes that may include unpaved sections suitable for families. It's advisable to check specific route details on komoot, as some routes are described as having mixed terrain that might be manageable for older children or those with some biking experience.

What kind of wildlife might I encounter while gravel biking?

Deer Island Open Space Preserve is home to a variety of wildlife. You're likely to see deer, and the preserve supports a rich bird population including red-shouldered hawks, white-tailed kites, barn owls, and various woodpeckers in the woodlands. The marshlands attract snowy egrets, great egrets, and white pelicans. Coyotes are also common inhabitants, and in spring, the grasslands burst with wildflowers.

Are there any loop gravel bike trails in the area?

Yes, several gravel biking routes in the vicinity of Deer Island Open Space Preserve are designed as loops. Examples include the Old Town Novato – Old Town Novato loop from Novato Downtown, which offers varied elevation changes, and the Loma Alta Summit – 680 Trail loop from Sleepy Hollow for a more challenging experience.

What is the best time of year to go gravel biking in Deer Island Open Space Preserve?

The preserve transforms with the seasons. While gravel biking is possible year-round, spring offers the vibrant display of wildflowers in the grasslands. Winter brings bright green landscapes, while by May, the grasslands are waist-high and thistle-filled. Consider the seasonal changes for your preferred riding conditions and scenery.

Are there any historical landmarks or points of interest along the trails?

Yes, within Deer Island Open Space Preserve, you can find historic remnants of an 1800s dairy farm. While specific routes may not directly pass through them, exploring the preserve offers a chance to connect with its past.

What do other gravel bikers enjoy most about riding in Deer Island Open Space Preserve?

The area is highly rated by the komoot community, with an average score of 5.0 stars. Reviewers often praise the diverse terrain, from open spaces to quiet woodlands, and the scenic views of the natural landscape, including wetlands and marshes. The variety of routes catering to different difficulty levels is also frequently appreciated.

Are dogs allowed on the gravel bike trails?

Deer Island Open Space Preserve is generally known for being dog-friendly, particularly on its hiking trails. However, specific regulations for gravel biking routes may vary. It's always best to check the current rules for each individual trail you plan to ride to ensure dogs are permitted and if they need to be on a leash.

Where can I find parking for gravel biking in Deer Island Open Space Preserve?

Parking is typically available at designated trailheads or access points around the preserve. For routes starting from Novato Downtown, you would generally find parking within the town area. Always check the specific starting point of your chosen komoot route for the most accurate parking information.

Most popular routes in Deer Island Open Space Preserve

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