Fiesta Island is my favorite place to ride! You can ride on the beach or on a trail overlooking the beach. It is free. There are small islands close to the shore that you can swim to. It is not very populated! It is very fun.
I went there last summer, and while there were a fair amount of people there, it wasn't very difficult to locate a spot that was empty for my trailer and horses to be.
It was so much fun! There are almost NO waves, the water's warm and the sand's really nice and clean. And there weren't many boats or anything to disturb the horses.
There are some small sting rays, but they avoid the horses by a lot!
It's just a ton of fun, and I can't wait for it to heat up to head back! <3