Peshtigo Reef Light stands offshore in lower Green Bay at a long-known navigation hazard on Peshtigo Reef. Efforts to mark the shoal began in 1866 with funding for a daymark, followed by a skeleton tower in 1867, but winter ice made early solutions unreliable. A lightship approved in 1902 served from 1906, yet it had to be withdrawn each fall. With heavy coal traffic demanding a permanent aid, the present lighthouse was built in 1936 on a crib, steel, and concrete foundation. Never permanently manned, it was serviced from Sherwood Point Light and remains an active aid to navigation. In 2007 it was listed on the National Register of Historic Places.