Gros Cap Reefs Light

46°30′42″N 84°36′53″W / 46.51167°N 84.61472°W / 46.51167; -84.61472TowerConstructionskeletal towerHeight18 metres (59 ft)Shapeskeletal mast on a three-story keeper's quartersMarkingswhite tower with red trimOperatorCanadian Coast Guard^[1]LightFirst lit1953Focal height18 metres (59 ft)Range12 nautical miles (22 km; 14 mi)CharacteristicFl R 5s.

The Gros Cap Reefs Light is a lighthouse located at the entrance to St. Mary's River from Whitefish Bay of Lake Superior. The light was completed in 1953 and replaced a lightship stationed there since 1923.^[1] The lighthouse, owned by the Canadian Coast Guard, is located on the southwest edge of the Gros Cap Reef.

Light characteristic is a flashing red light, every 5 seconds, visible for 12 miles. Its tower has been removed, the structure is merely a 3-story base which houses the keeper's quarters, with the light mounted on a skeletal mast. The lighthouse also has a helipad.^[1] It formerly housed a non-directional beacon as part of the precision approach at Sault Ste. Marie Airport but has since been decommissioned and the antenna taken down due to high maintenance costs.

The opening of this aid to navigation resulted in the deactivation of the Point Iroquois Light in 1962.^[2][3]

• List of lighthouses in Ontario
• List of lighthouses in Canada

• Rowlett, Russ. "Lighthouses of Canada: Western Ontario". The Lighthouse Directory. University of North Carolina at Chapel Hill.

• Aerial photo at Marinas.com
• Anderson, Kraig, Lighthouse Friends, Gros Cap (Ontario) Reefs Light).
• Photograph, Amateur Radio Lighthouse Society ARLHS CAN-565 Light, Gros Cap Reefs Light.
• Aids to Navigation Canadian Coast Guard