The Hennepin Canal State Trail, also just called the Hennepin Canal, is an abandoned waterway in northwest Illinois, between the Mississippi River at Rock Island and the Illinois River near Hennepin. The entire canal is listed on the National Register of Historic Places. Opened in 1907, the canal was soon abandoned because of railroad competition. It was resurrected in the late 20th century as a recreational waterway. Its former name was the Illinois and Mississippi Canal.