Assuming that you have to turn right to get to the path by the ocean and left to go anywhere else, I would think that there must be something that spooked him while going left. A noise?, a smell? an aggressive behaviour - human or animal?, ...something must have triggered his reaction. Especially, as he is fine if you drive him anywhere else.
What you could try - if you cannot identify what spooked him, is to drive with him "to the left" then park and try to walk back towards your place - see if he stops, and where - maybe you can identify the trigger. Once you do that, there might be things you can do to make him comfortable walking anywhere again.
....as a last resort - turn right, then , right, then right again, and go whwre you want to...just take a longer route
Of course, all this is if any health concerns are addressed.