Sea Rim State Park, Coastal state park in Jefferson County, Texas, US

Sea Rim State Park is a coastal area in Texas where sandy beaches meet expansive marshes that stretch inland from the Gulf of Mexico. The park is divided into different units, each offering distinct landscapes and access points for exploring the environment.

The land was acquired by the state in 1972 to protect it from industrial development. The park opened to the public in 1977 and has since become an important protected coastal area.

Birders come for the Gambusia Nature Trail, the Willow Pond boardwalk and a viewing platform on Fence Lake, reached by boat. The park loans binoculars, fishing and crabbing gear, and junior ranger backpacks free at headquarters. McFaddin National Wildlife Refuge borders the park.

The park has two units: the Beach unit gives access to the Gulf shore, while the Marsh unit holds the boat launch for the boat trails and the park's only cabin. Campers can choose sites with water and electric service off the beach or primitive sites on the beach itself. Swimming in the marshes is not recommended because of alligators. Highway 87 through Sea Rim toward High Island is closed.

The park does not rent canoes or kayaks, so the boat trails into the marsh must be explored with your own craft. At the headquarters building, fishing gear, crabbing gear, junior ranger backpacks and binoculars are loaned free of charge. The park's only cabin stands in the Marsh unit beside the boat launch.