Sea Rim State Park
“Sea Rim State Park has 5.2 miles of Gulf shoreline and 4,000 acres of marshlands.”
Here is the Park website. Phone 409-917-2559 Trails Map
? Gambusia Marsh Nature Trail 0.75 miles and Dune Boardwalk 0.1 mile are both described as easy. However, there are no claims for accessibility so perhaps the boardwalks have steps or other obstacles. Call to find out.