The Delaware Mine is located off U.S. Highway 41, 12 miles (19.3 km) south of Copper Harbor, Michigan

Copper Harbor, Michigan

Copper Harbor is a small unincorporated community in northeastern Keweenaw County in the U.S. state of Michigan. It is within Grant Township on the Keweenaw Peninsula that juts from the Upper Peninsula of Michigan into Lake Superior.-History:...

 and is a Keweenaw Heritage Site

Keweenaw National Historical Park

Keweenaw National Historical Park is a unit of the U.S. National Park Service. Established in 1992, the park celebrates the life and history of the Keweenaw Peninsula in the Upper Peninsula of the U.S. state of Michigan...

. The Delaware Copper Mine provides tours of one of the oldest copper mines in the Keweenaw, dating back to 1846. The mine had five shafts, with the deepest reaching 1400 feet (426.7 m). The mine is open June through October and offers guided and self-guided tours.