Grand Portage Marina, Protected Access




145.9 miles NE of the Duluth Harbor Entry
16.2 miles NE of Horseshoe Bay
23 miles SW of Isle Royale, MI
43 miles SW of Thunder Bay, Ontario, Canada
Lat 47º 57.21 Lon 89º 41.21


The Grand Portage Marina and protected access are owned and operated by the Grand Portage Band of the Chippewa.  The 30 slip marina receives some protection from its location within Grand Portage Bay; however the bay itself is shallow in spots and may impede deeper draft vessels.

Contact Information:

Grand Portage Marina & RV Park external link


  • Protected launch ramp within the marina basin (marina dredged winter 2013)
  • 45 car/trailers parking spaces, gravel lot
  • Restroom facilities
  • 30 slips (up to 30’)
  • Convenience store
  • Fuel
  • Pump-out
  • Food and lodging nearby


The Isle Royale National Park ferry operates out of the Voyageur Marina on the NE corner of the bay which is also operated by the Grand Portage Band of the Chippewa.