Mare Island 🏝️ Vallejo – Old Navy Base loop from Mare Island

Routes

Hiking trails & Routes

Mare Island 🏝️ Vallejo – Old Navy Base loop from Mare Island

Easy

5.0

(5832)

16,271

hikers

Mare Island 🏝️ Vallejo – Old Navy Base loop from Mare Island

00:44

2.90km

Hiking

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: October 8, 2026

Waypoints

Start point

Parking

Get Directions

31 m

Mare Island 🏝️ Vallejo

Highlight • Natural

Extensive wetlands, recently made accessible after military use. Great for bird watching.

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481 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.

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836 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.

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1.51 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.

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2.49 km

Mare Island Bird Observation Area

Highlight • Lake

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 …

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