The way I understand it the guy does not own the beach he owns the road people want to use/trespass to get to that beach. Does every land owner have to provide access through their property if next to public land?
Is the road considered a “public thoroughfare”, meaning that the road is or was built or maintained by the city, county, state, etc. Or is it a private lane on private property and built/maintained by the property owner?
If there’s no easement or right of way there, then the only options are to purchase the right of way, or find another access route on public property.