Regardless of the title, the key to this issue is that while California beaches below the high tide line are open to the public, access over private land is not

Regardless of the title, the key to this issue is that while California beaches below the high tide line are open to the public, access over private land is not part of the deal. One could walk along a beach, or arrive by water, or access from and over public land, and be within one’s rights, but there is no right to walk thru somebody’s private land to get to the public beach. Note that the Khosla / Martin’s Beach case also contains an issue of changing public access without a permit from the Coastal Commission. That’s complicated.