The Fort De Soto Dog Beach Park in St. Petersburg, FL, has two large fenced areas for off-leash fun both large and small dogs. It also has dog showers for hot days. The rest of the park allows dogs on leash, except for the beach areas. The only beach area that allows Fido is the Paw Playground area. Fort De Soto also has plenty for two-legged visitors, too. There is an old Spanish fort to explore, overnight camping with plenty of amenities, and picnic areas.