In 1931 it was moved offshore on to DeTour Reef .
In 1847 a lighthouse was located on shore at Point DeTour , Michigan to protect the DeTour Passage at the northwestern end of Lake Huron .
In 1931 DeTour Passage was moved offshore on to DeTour Reef .
In 1847 a lighthouse was located on shore at Point DeTour , Michigan to protect the DeTour Passage at the northwestern end of Lake Huron .