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United States
California
Santa Clara County
San Jose

Mallard Slough Trail

Moderate

4.5

(2127)

6,857

runners

Mallard Slough Trail

00:41

5.68km

0m

Running

Jog the Mallard Slough Trail, a moderate 3.5-mile route in Don Edwards San Francisco Bay National Wildlife Refuge, offering marsh views and

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Don Edwards San Francisco Bay National Wildlife Refuge

New Chicago Marsh

Waypoints

A

Start point

Parking

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1

965 m

Mallard Slough Trail

Highlight (Segment) • Trail

The Mallard Slough Trail is a nice closed-off loop that circles a small lake in the middle of a marsh. This is a well marked path with viewing platforms along …

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B

5.68 km

End point

Parking

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Way Types & Surfaces

Way Types

5.16 km

468 m

< 100 m

Surfaces

5.16 km

488 m

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Elevation

Elevation

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Weather

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Saturday 18 July

24°C

14°C

0 %

Additional weather tips

Max wind speed: 13.0 km/h

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Frequently Asked Questions

Where can I park to access the Mallard Slough Trail?

Parking is typically available at designated areas within the Don Edwards San Francisco Bay National Wildlife Refuge. It's always a good idea to check the official refuge website for the most current information on access points and parking availability before your visit.

Is the Mallard Slough Trail suitable for jogging with dogs?

Dogs are generally permitted on a leash on designated trails within the Don Edwards San Francisco Bay National Wildlife Refuge, including the Mallard Slough Trail. Please ensure your dog remains on a leash at all times to protect the local wildlife and for the safety of other visitors. Always pack out any waste.

What is the best time of year to jog this trail?

The trail offers unique experiences year-round. However, for comfortable jogging, spring and fall are ideal due to milder temperatures. Winter can be good for birdwatching, but be aware that sections of the trail may be subject to seasonal closures during hunting season (late October to late January). Always check current conditions before heading out.

Do I need a permit or pay an entrance fee to access the trail or the refuge?

No, there are typically no entrance fees or permits required to access the Mallard Slough Trail or the Don Edwards San Francisco Bay National Wildlife Refuge for day use. However, it's always wise to check the official refuge website at fws.gov for any updates on regulations or special events.

What is the terrain like for jogging on the Mallard Slough Trail?

The trail is primarily a dirt and gravel road or a compacted dirt levee, offering a relatively flat surface. While generally easy, some sections can be bumpy, have larger gravel, or feature soft spots. It's important to note that the trail can become muddy after rain, which might require more moderate effort.

What kind of wildlife can I expect to see while jogging?

The trail is a fantastic spot for birdwatching! You'll be treated to abundant waterfowl and migratory birds such as egrets, herons, shorebirds, ducks, pelicans, and cormorants, especially in the tidal marshes and salt ponds. Keep an eye out for other marsh inhabitants as well.

Are there any notable landmarks or viewpoints along the route?

Yes, the trail offers expansive views of tidal marshes, vibrant yellow and red salt ponds, and open water. You'll also get views of the surrounding Bay Area ridgelines. A unique feature is a spur trail that provides access to views of the historic ghost town of Drawbridge.

Does the Mallard Slough Trail connect with other paths?

Yes, the route is part of the larger San Francisco Bay Trail system. It also intersects with sections of the Alviso Slough Trail, New Chicago Marsh Trail, and Marsh View Trail, offering opportunities to extend your outing.

How long does it typically take to jog the Mallard Slough Trail loop?

The full loop is approximately 5.7 kilometers (about 3.5 miles) and typically takes around 40 minutes to jog, depending on your pace and how often you stop to enjoy the scenery or wildlife.

Are there any current closures or important notices for the trail?

Yes, it's crucial to check current conditions before visiting. The trail has been subject to closures due to construction, with some parts expected to remain closed until September 2025. Additionally, seasonal closures occur during hunting season, typically from late October to late January.

What should I bring for a jogging trip on this trail?

Given the varied terrain and potential for mud, sturdy jogging shoes are recommended. Bring water, especially on warmer days, as there is no water available on the trail. Binoculars are great for birdwatching, and don't forget sun protection like a hat and sunscreen, as the trail is exposed.

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