McGrath State Beach is a protected beach park located on the south bank of the mouth of Santa Clara River in the city of Oxnard, California. McGrath State Beach is one of the best bird-watching areas in California, with the lush riverbanks of the Santa Clara River and sand dunes along the shore. A nature trail leads to the Santa Clara Estuary Natural Preserve. Located south of Ventura on Harbor Boulevard, the beach is on the Pacific Coast Bicycle Route and the California Coastal Trail. Camping sites are available. Two miles of beach provide surfing and fishing opportunities.