Located in the southernmost part of the city of Imperial Beach, Border Field State Park has a beach which is situated along the United States - Mexico border. The beach has the distinction of being the southernmost beach of California. The beach has light brown sand and the Tijuana River forms an estuary in the northern part of the beach and also forms a wetland near it. While Border Field State Park does not have any lifeguards, the state park area near the beach offers many amenities including hiking and equestrian trails, picnic tables, and restrooms. Border Field State Park Beach is a bit difficult to access as the park is often closed to the public due to frequent flooding of access roads during storms. To access Border Field State Park Beach, simply turn from California Interstate Highway 5 to Dairy Mart Road and keep following it until it merges into Monument Road, which will lead to the entrance and the parking area for Border Field State Park, from where you can walk to the beach.