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Routes
Hiking trails & Routes
United States
California
Solano County
Vallejo

Mare Island San Pablo Bay Trail

Easy

2.5

(1)

27

hikers

Mare Island San Pablo Bay Trail

01:26

5.74km

0m

Hiking

Enjoy an easy 3.6-mile hike on the Mare Island San Pablo Bay Trail, offering bay views, birdwatching, and historical insights.

Last updated: February 26, 2026

Waypoints

A

Start point

Parking

Get Directions

1

466 m

Old Navy Base

Highlight • Historical Site

Mare Island San Pablo Bay Trail loops through a former Navy base, that was closed in 1996 and opened back up to the public in 2016.

Tip by

2

822 m

Bay front views

Highlight • Viewpoint

There are great views and bird watching along the bay front portion of the trail. The zone has only been converted from a closed military area to public access since 2016.

Tip by

3

1.49 km

Mare Island Bayfront Overlook

Highlight • Viewpoint

The San Pablo Bay views and the Mare Island wetlands here become accessible for hikers and bird watchers in 2016.

Tip by

4

5.34 km

Mare Island is a 3.5-mile long peninsula and offers great birding. Along with many varieties of waterfowl there also is a population of the endangered Salt Marsh Harvest Mouse. Mare Island became a naval shipyard in 1852, but was closed in 1995.

Tip by

B

5.74 km

End point

Parking

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Way Types & Surfaces

Way Types

5.72 km

< 100 m

Surfaces

< 100 m

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Elevation

Elevation

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Weather

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Friday 8 May

18°C

12°C

-- %

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This route was planned by komoot.

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Frequently Asked Questions

What is the terrain like on the Mare Island San Pablo Bay Trail?

The trail features a flat, wide, and well-maintained surface, often composed of gravel. It is largely level with minimal elevation gain, making it highly accessible and suitable for strollers and robust wheelchairs.

What kind of views and scenery can I expect along the route?

You'll be treated to panoramic vistas of San Pablo Bay and the surrounding natural landscape. On clear days, views extend to distant mountains like Mount Tamalpais and Mount Diablo. The trail runs alongside wetlands, offering excellent birdwatching opportunities. You'll also find interpretive panels detailing Mare Island's rich history, particularly its role as an Old Navy Base.

Is the Mare Island San Pablo Bay Trail suitable for all ages and fitness levels?

Yes, the trail is widely regarded as an easy hike due to its minimal elevation gain and flat terrain. It's an ideal option for a leisurely stroll, a quick run, or a nature walk suitable for all ages and fitness levels, including families.

What wildlife can I expect to see along the trail?

As a critical part of the Pacific Flyway, the trail is a prime location for birdwatching. You can expect to see various species including common ducks, geese, and migratory birds, especially during winter. The Mare Island Bird Observation Area is a great spot for this.

What is the best time of year to hike the Mare Island San Pablo Bay Trail?

The trail can be enjoyed year-round. However, winter is particularly good for birdwatching due to migratory birds. Be aware that there is very little shade, so consider cooler parts of the day during warmer months. It can also be quite windy.

Is the Mare Island San Pablo Bay Trail dog-friendly?

No, dogs are generally not permitted on the trail, with the exception of service animals.

Are there any fees or permits required to hike the Mare Island San Pablo Bay Trail?

The Mare Island San Pablo Bay Trail is located within the Mare Island Shoreline Heritage Preserve. There are no specific fees or permits required for hiking the trail itself.

Where can I park to access the trail?

Specific parking information is not detailed in the provided data, but the trail is generally accessible. It's advisable to check local resources or the Mare Island Shoreline Heritage Preserve website for current parking options and directions before your visit.

What should I be aware of regarding sun exposure and wind on the trail?

There is very little natural shade along the trail, leading to significant sun exposure. It can also be quite windy. It's recommended to bring sun protection (hat, sunscreen) and layers of clothing to account for potential wind.

Are there any specific safety precautions I should take?

Hikers should be aware of ticks, especially in areas with taller grasses. Taking precautions like wearing long pants and checking for ticks after your hike is advisable.

Does the trail offer different length options?

Yes, the trail offers flexibility. You can choose options for a shorter out-and-back walk to a viewpoint, such as the Mare Island Bayfront Overlook, or extend your hike to a nearly 4-mile loop.

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