Map G. Marsten Dame Marina 105 N Rose Street, Northport, MI 49670 Add To Trip WebsitePhone: (231) 386-5411 Description Marina: 45° 07' 48" N 85° 36' 38" W. Total Slips: 100. Seasonal Slips: 33. Transient Slips: 67. Videos TripAdvisor® Traveler Reviews More To Explore Categories: Boating Recreation City: Northport Region: Northwest Although the MEDC uses reasonable efforts to maintain the accuracy of the website content, it is not represented to be error free. Read legal information.