St. Marks River State Park which opened in 2007, is the 161st Florida State Park, located about 10 miles east of Tallahassee, south of U.S. Highway 27. The park's 2,589 acres occupy parts of Jefferson and Leon counties and act as a buffer from development for the St. Marks River. References External links St. Marks River Preserve State Park at Florida State Parks St. Marks River State Park St. Marks River State Park Parks in Leon County, Florida Parks in Jefferson County, Florida State parks of Florida Protected areas established in 2007 2007 establishments in Florida