Notice to visitors: Construction to repair former salt pond levees at Pond A2W in the Don Edwards San Francisco Bay National Wildlife Refuge will begin on August 31, 2026, and continue through November 2026. Trail closures will be necessary as construction activities occur. The Song Sparrow Spur Trail along the eastern and northern levee of the pond will be closed throughout the construction period. The northernmost end of the Stevens Creek Trail (south of the entry gate onto the Song Sparrow Spur Trail on National Wildlife Refuge lands) will be intermittently closed for shorter periods for material deliveries. See Figure 1 for a map of the closures and Figure 2 for the access routes that will be used to reach the work site.

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Fact Sheet
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White pelican flying over a marsh with a city in the background.
In the heart of California's high-tech industry lies a wildlife oasis in an urban sea with 30,000 acres of habitat for millions of migratory birds and endangered species. Established in 1972 through local activism, the refuge provides not only critical habitat for threatened and endangered species...
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A bright blue sky obstructed by fluffy white clouds reflected off of a stream shot from inside a kayak
The U.S. Fish and Wildlife Service manages an unparalleled network of public lands and waters called the National Wildlife Refuge System. With more than 570 refuges spanning the country, this system protects iconic species and provides some of the best wildlife viewing opportunities on Earth.
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Trails
Wildlife refuges