70 Gros Cap Reef (ON 86)
September 7, 2009
latitude 46° 30' 43.7" N
longitude  84° 36' 55" W

The lighthouse is mounted on a unique concrete crib that has a knife-edge similar to a ship's prow pointed northwest; this design splits ice floes in the winter. Located on the southwest edge of the reef guarding the entrance to the river from Lake Superior.