A Michigan fishing license is needed while fishing in the waters of Lake Superior, but not on the inland lakes.
NPS
At Isle Royale National Park, a valid Michigan fishing license is required to fish in Lake Superior, and fees vary. Children under 17 years of age do not require a license. Visitors fishing in Lake Superior waters must follow the fishing license requirements in accordance with the laws and regulations of the Michigan Department of Natural Resources. Fishing licenses are not required to fish on the inland waters of Isle Royale.
