levees in don edwards wildlife refuge, dumbarton bridge and coyote hills regional park, fremont, san francisco bay area,

america area background bay baylands blue bridge california clear coyote hills delta don edwards dumbarton east fremont grass green horizon landscape levees marsh meadow natural outdoors park path plants ponds protected refuge restoration san francisco scenery scenic shoreline shrubs sky slough south spring sunny sunshine swamp trail trees united states water waterways wetlands