To access McGrath State Beach, you will need to walk one mile north or south from Mandalay State Beach or Surfer’s Knoll Beach. If you are camping, you can find the campground’s entrance on North Harbor Boulevard between W Gonzales Road and Olivas Park Drive. Another way to access McGrath State Beach is parking in front of a gated road signed "State 735 Tank Battery" on the south side of the campground entrance and walking a few yards west to the beach.Located in the city of Oxnard, McGrath State Beach is a two-mile-long and wide beach situated at the point where the Santa Clara River meets the North Pacific Ocean. McGrath State Beach is a natural preserve and is protected by a state park of the same name and Santa Clara Estuary Natural Preserve. McGrath State Beach is on the north side of McGrath Lake and is a well-known destination for birdwatching.