Between Sycamore Cove Beach at 9000 Pacific Coast Highway, which is part of Point Mugu State Park, and County Line Beach, across the street from Neptune's Net and Yerba Buena Road at 42505 Pacific Coast Highway, there are three or four access points to the beach.
Look for the brown "Coastal Access" signs.
The first access point is just over a mile southeast of Sycamore Canyon at about 10302 Pacific Coast Highway. There is parking on PCH and an old staircase adjacent to a Call Box.
Another access point is another 1/2 mile east is at approximately 9999 Pacific Coast Highway, near the juncture of Deer Creek Road. You'll see another brown Coastal Access sign and blue Call Box. Park on PCH and look for the staircase.
The final southeast stretch of PCH between the access point above and Neptune's Net has even less distinguishable areas, but you can pull over to the side and park over most of this stretch (except when there are No Parking signs).