Although located on Aransas Bay, there is no swimming area at this park. The shoreline is comprised of concrete bulkhead, oyster shell, mud flat, and marsh grass. The main recreational activities are camping, excellent birding, and fishing (the park participates in the "Loan A Tackle Program" and lends out fishing tackle to visitors.) Other activities include picnicking, boating (motors allowed), nature study, wildlife observation, and photography. Tours: Guided nature hikes are held year round. Guided birding tours are held from January through April.
Lantana Loop rather than a hiking trail is a campground loop with a little trail off of it. It costs $5 per person to get in to use the minuscule trail. The campground is called Goose Island State Park and is a fishermans dream, I believe. We were told of a free trail nearby called Big Tree. This turned out to be a very impressive oak tree with a paved path circling around it. Off to the side was a little dirt path which led to an old cement road going down to the water in about 2/10ths of a mile. There were lots of mosquitoes (March 2017)). Pretty view, nice sea breeze but hardly could call this a trail.
My friend and I spent an enjoyable weekend at this park birding, camping and hiking. Definitely bring the mosquito repellent for the more wooded areas, but the wind is strong enough at the beach to keep them away. The dog loved playing in the surf, and there was lots of wildlife to see. The hiking is minimal, and it's predictably hot in the summer, so this was not a primary activity for us.