Sunset Marina is owned by the City of Rock Island and professionally managed by F3 Marina. Located in Sunset Park at 31st Avenue and the Mississippi River in Rock Island, Illinois, our beautiful harbor is surrounded by 250 acres of woods and a tranquil, secluded park with jogging paths, playgrounds, and picnic areas. The spacious marina boasts 395 slips for seasonal, monthly, and overnight docking; slips range from 16 feet to 60 feet in length.