Keweenaw National Historical Park officially established on October 27, 1992. This preserved one of Michigan’s most fascinating and enduring stories, the history of copper mining in the Keweenaw Peninsula. This northern stretch of Michigan’s Upper Peninsula is home to the largest known deposit of pure native copper in the world. A resource that has shaped cultures, industries, and communities for thousands of years. Keweenaw Copper The copper of the Keweenaw Peninsula is unique. Unlike most copper ores, it occurred here in an incredibly pure form, up to 97% pure. The purity of the copper allowed it to be hammered directly… Read More »












