The Fort DeSoto fishing piers are along a major fish interstate. Right off the pier you can catch everything from pompano to Spanish kings to tarpon. Both piers are open daily from 7am-11pm. The great thing about fishing on both piers is that no fishing license is required. Fort DeSoto Park is a Spanish-American War era military ruins that sits atop Mullet Key Bayou south of St Petersburg, Florida. The park contains 1,136 acres of land and five interconnected islands.