Alvin Clark was a schooner that sailed the Great Lakes for almost two decades. Constructed in 1846 or 1847, it sank during a storm in Green Bay in 1864. It was salvaged in 1969 and moored in Menominee, Michigan, at the Mystery Ship Seaport, located in the Menominee River at the foot of Sixth Avenue. The ship was designated a Michigan State Historic Site in 1972 and listed on the National Register of Historic Places in 1974; Alvin Clark was removed from the National Register of Historic Places on June 10, 2020. Although the schooner was in pristine condition when raised, no plans were in place for its conservation, and the ship rapidly deteriorated. The remains of Alvin Clark were destroyed in 1994.