The Ontonagon Lighthouse, which has been on the National Register of Historic Places since 1975, is open to the public six days a week and tours are conducted from the Ontonagon County Historical Society Museum located in the downtown section of the Village.
Visitors are taken up to the lantern room for a great view of the lake, harbor, and the unique profile of the Porcupine Mountains 20 miles distant. There are also historical maritime displays, and a convenient gift shop at the museum complex.
The light tower is three stories high, or 39 feet from the water to the focal plane, and is surmounted by an iron decagonal beacon house, which housed the fifth order Fresnel lens and light. Around the beacon house is a square, iron gallery consisting of a platform and rail.