Round Island Lighthouse and State Historic Marker

Round Island Passage Light (1948, automated in 1973) also known as Mackinac Island light.

Round Island Light (1895, automated in 1924, deactivated from 1947-1996). 

The Round Island and Round Island Passage Lights are only about 600 yards apart and Great Lakes freighters in route between Lake Michigan and Lake Superior pass between them.

The self unloading bulk freighter John G. Munson passed through the Round Island passage while I took photos. There is a narrow channel between the base of the breakwater and the shore, and as the freighter passed, the water rushed rapidly through in one direction and then back in the opposite direction.