Goose Island State Park is located near Rockport, TX. The trail is primarily used for birding.
It was a really nice place. The hiking trails were really short though and not really worth the 5 dollar per person entry fee. However, If you going there to fish you might have a blast.
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.