Coronado dunes are special because they spell out Coronado.  But that’s not the only reason why the dunes are rare.  They have several functions.

The beach dunes can be great for a challenging jog.  I would go barefoot unless you have multiple pairs of running shoes - one in which you can designate for running on the beach.  Because I don’t know about you but having sand in my shoes drives me mad.  Work out those calves and shape those strong legs all while obtaining a natural tan.  

OR, if you are like me, and love the feeling of being solo, then use the dunes for that sole purpose.  Going to the beach is great in itself but the feeling that you’re on a deserted island can be even better.  Uh, yes, a deserted island that consistently has hilocpters and planes flying over.  But no matter, plug in those headphones, lather on some sunscreen and read, nap, write, listen or whatever suits your fancy.  

You may have the occasional passer by but hey, where does one find a completely deserted island.  The next best thing: Coronado’s dunes.