9. Mallard Slough Trail - Alviso

Overview Map Highlighting Trails at the Environmental Education Center

3.3 mile loop, or 4.3 miles (with a 1 mile roundtrip Mallard Slough Trail Spur option)

Amenities and Uses
Information, parking, restrooms, drinking water, observation platform, hiking, bicycling. No pets.

Trail Surface
Flat, compacted dirt levee. The trail turns to mud after rain.

Great place to see white pelicans, double-crested cormorants, ducks in the winter, shorebirds in the spring and fall, and Caspian terns in the spring and summer. This trail passes through a variety of wildlife habitats and hundreds of birds loafing on manmade islands, and provides views of the refuge’s ghost town, Drawbridge.

Connections to Other Trails
Connects with the Alviso Slough Trail. 

Directions to Trailhead
From HWY 880 or 101, exit on HWY 237 toward Mountain View/Alviso. Turn north onto Zanker Rd. and continue to the refuge entrance (a sharp right turn at Grand Blvd.). The trailhead is accessible from the Environmental Education Center parking lot. Walk through the butterfly garden or New Chicago Marsh Trail to reach the levee overlooking the pond.

Click on the map to enlarge. Click here for print-friendly version (pdf, 1.2 MB)

Alviso Slough and Mallard Slough Trail Map