Don Edwards San Francisco Bay National Wildlife Refuge is a 30,000-acre oasis that lies within the heart of California's high-tech industry that provides habitat for millions of migratory birds and endangered species. The refuge includes more than 10,000 acres of tidal areas and salt ponds that are open to waterfowl hunting. There are a variety of options here, including hunting ponds and tidal areas from land, hunting from a boat, and hunting from established blinds. Most exciting for hunters is the refuge's addition of former commercial salt ponds in 2003. Before becoming part of the refuge, these ponds were used for solar salt production. Today, the ponds are being managed for increase tidal flow that has increased waterfowl use significantly. Thousands of mallard, northern pintail, American wigeon, northern shoveler and ruddy duck use the refuge every fall and winter as it lies within the Pacific Flyway. Unlike the wild settings of many national wildlife refuges, this refuge borders a densely urban area, with commercial buildings right up to the edge of the refuge boundary. Waterfowl hunters share common trails in accessing our hunt areas with other refuge visitors.