Ludington Light is a fifty-seven-foot steel-plated lighthouse at the end of the north breakwater on Pere Marquette Harbor in Ludington, Michigan, where the river meets Lake Michigan. Established in 1871 and first lit in its present form in 1924, it was built into the steel and reinforced-concrete pier on an exposed harbor entrance, with a prow-like base to split incoming waves. Still an active aid to navigation, it was automated in 1972 and retains integrated fog-signal and radio-beacon systems. Its original Fourth Order Fresnel lens was replaced in 1995, and after ownership passed from the Coast Guard to the City of Ludington in 2006, it opened for public climbing tours.