Central Florida - Monroe Harbour Marina on Lake Monroe is part of the St. Johns River. Ashore, Historic Downtown Sanford with its shops and historic buildings is a few blocks away. Sanford's RiverWalk, meanders along the lakeshore on both sides of the marina. We are also home to U-Sail of Central Florida and the St Johns Rivership Company. Our central location means easy access to the Orlando area's world famous attractions, as well to Daytona and the beaches. Monroe Harbour Marina is the first to become Florida's marine facility to achieve Clean Marina, Clean Boatyard and Clean Retailer designations! This is an accomplishment that makes us proud.