McLaughlin Eastshore State Park, Wildlife refuge and state park along San Francisco Bay, California, US.

McLaughlin Eastshore State Park is a wildlife refuge and California state park running along the eastern shore of San Francisco Bay, spanning parts of Alameda and Contra Costa counties. The land covers tidal flats, salt marshes, and coastal grasslands that sit just beside urban areas along the East Bay corridor.

The East Bay shoreline was heavily developed and used for landfill through the 1960s, prompting Sylvia McLaughlin to found Save San Francisco Bay Association in 1963. After decades of advocacy and land purchases by the East Bay Regional Park District, the park was established and originally named Eastshore State Park. In October 2012 it was renamed to honor McLaughlin, who had died that year.

Along the shoreline trail, visitors often spot shorebirds, herons, and ducks at close range, as the animals have grown used to foot traffic. The salt marshes draw different species than the open grassland areas further from the water.

The park stretches 8.5 miles along the East Bay shore between Richmond and Oakland, with separate units such as Point Isabel, Albany Beach, the North Basin Strip, Berkeley Meadow and Brickyard Cove. Since 2013 the East Bay Regional Park District manages it under a 30-year agreement with California State Parks. North Point Isabel, a capped landfill, is popular for off-leash dog walking.

Much of the open land in the park sits on top of a former landfill, and the low mounds visible from the trail are actually compacted layers of old waste covered with soil. Below the surface, a network of pipes still draws off methane gas produced by decomposing material underground.