Don Edwards San Francisco Bay National Wildlife Refuge Park

Address: Don Edwards SF Bay NWR, 1 Marshlands Rd, Fremont, CA 94536, United States (visitor center addresses vary by unit)

Website: https://www.fws.gov/refuge/don_edwards_san_francisco_bay

Hours: Most units open daily sunrise-sunset; visitor centers have varying hours (check refuge website)

Admission: Visitor centers free; activities and special programs may have fees

Don Edwards San Francisco Bay National Wildlife Refuge is a U.S. Fish and Wildlife Service refuge on the southern shore of San Francisco Bay in California that conserves tidal marshes, mudflats and associated bay habitats. The refuge encompasses multiple separate units across the South Bay and is a key urban-area sanctuary for migratory birds.

The refuge offers boardwalks, trails and observation platforms through restored marsh and salt pond landscapes, with seasonally rich birdlife including shorebirds and waterfowl. Several visitor facilities provide exhibits and guided programs, and popular access points include areas around Alviso and other South Bay units.

The refuge was established to protect remaining tidal marsh and bay habitats in the South Bay as urban development expanded around the bay. Management by the U.S. Fish and Wildlife Service has focused on habitat acquisition, restoration of tidal flows and public education through visitor programs.

Units of the refuge lie along the southern edge of San Francisco Bay within Santa Clara and Alameda counties, with principal public access points near Alviso, Fremont and other South Bay communities and within driving distance of San Jose and the broader Bay Area.

• Habitat protection: Protects extensive tidal marsh, mudflat and salt pond habitats in the southern portion of San Francisco Bay and supports seasonal migratory birds and other wildlife.
• Multiple units and access: Comprised of multiple separate units along the South Bay shoreline, offering miles of trails and boardwalks for birdwatching and wildlife viewing.

What to See#

• Environmental Education Center (Alviso): A visitor centre at Alviso that provides exhibits on bay ecology, guided programs and access to trails and observation platforms over tidal marsh and mudflats.

The refuge spans multiple units across the southern San Francisco Bay (Fremont, Alviso, Hayward). The main visitor centers and trailheads are reachable by car; public transit options vary by unit - consult the refuge website for specific unit directions.

• Visit the Warm Springs Unit (south San Jose) for boardwalk trails and the Eden Landing Unit for migratory birdwatching.
• Bring binoculars at high tide for raptor and shorebird spotting; seasonal guides list species on refuge websites.
• Check for guided tours and volunteer-led walks - they offer detailed views into ongoing restoration work and wildlife patterns.