Jefferson Beach Marina is a destination within a destination. Centered on the Lake St. Clair Nautical Mile, surrounded by fabulous restaurants, shopping and attractions, Jefferson Beach guests and members appreciate having easy access to a variety of land and lake activities. Enjoy a day on the lake or a tour of the town, then come watch the sun set with friends and family in the comforts of our secure harbors. With all the amenities of home, you’ll have a hard time leaving.