Long before European boots touched the Keweenaw, Native Americans were mining copper from pits along Lake Superior and on Isle Royale. Archaeological evidence dates this activity from roughly 5000 BCE to 1200 BCE - making these among the oldest metal-mining operations anywhere in the Western Hemisphere. The miners hammered raw copper from exposed rock using stone tools, shaping it into knives, spear points, awls, and ornamental pieces. The copper traded along networks that stretched across the continent. By the time French missionary Claude Allouez wrote the first European account of Michigan copper in 1667, the Ojibwe people occupied the region, though they did not mine it themselves. Ojibwe oral tradition held that they had supplanted earlier peoples - the original miners. When missionary Claude Dablon was guided to the Ontonagon Boulder, a 1.5-ton mass of pure native copper along the Ontonagon River, the scale of what lay beneath these forests began to register with the outside world.

The modern copper rush ignited in the 1840s. State geologist Douglass Houghton published his copper report in 1841, the Treaty of La Pointe opened the land in 1843, and the Ontonagon Boulder made headlines back east. A federal mineral land office opened at Copper Harbor, and prospectors flooded in. Commercial production began in 1844 at the Phoenix mine. The Cliff mine followed in 1845 and became the first consistently profitable copper mine in the country. What made Michigan unique was the native copper itself - not oxide or sulfide ores requiring smelting, but pure metal that could be cut and shipped directly. From 1845 until 1887, Michigan led the nation in copper production. In most years between 1850 and 1881, the state produced more than three-quarters of all American copper. The wealth transformed the wilderness. The town of Red Jacket - now Calumet - built an opulent opera house, the Calumet Theatre, which hosted acts from around the world. Mine managers erected mansions that still line the streets of towns like Houghton, Hancock, and Ontonagon.

No name loomed larger over the Copper Country than the Calumet and Hecla Mining Company. At its peak, Calumet and Hecla was one of the most profitable mining operations in the world, extracting copper from conglomerate rock beds in shafts that plunged thousands of feet underground. The company dominated the region economically and politically, employing thousands of immigrant workers - Finns, Cornish, Italians, Croatians - who built the ethnic neighborhoods and churches that still define these communities. But native copper mining was a waning industry by the early twentieth century. Open-pit mines in Montana and Arizona produced copper sulfide ores more cheaply. Shaft mining grew ever more expensive as the workings went deeper. By 1968, Universal Oil purchased the struggling Calumet and Hecla. That same year, workers struck, and the new owners shut the mines for good. Michigan's native copper industry was dead.

The environmental legacy of 150 years of mining is written across the landscape. Stamp sand - the crushed waste rock from processing mills - formed enormous sterile beaches along the Keweenaw Waterway, some large enough to become hazards to navigation. These are now Superfund sites, slowly being rehabilitated. The mines consumed forests voraciously, for tunnel supports, housing, and steam power, stripping virtually every acre of the Copper Country of timber. Only a few pockets of old-growth forest survive, such as the Estivant Pines near Copper Harbor. But the ruins also became monuments. The Keweenaw National Historical Park now preserves key sites across the district. The Quincy Mine near Hancock, the Adventure mine near Greenland, and the Delaware mine near Copper Harbor welcome visitors underground. The mansions and theaters remain. The immigrant churches still hold services. The Copper Country found a second life as a place people visit precisely because of what was lost.

Copper mining's final act in Michigan played out not in the Keweenaw but at the southern edge of the Copper Country. The Nonesuch Shale in Ontonagon County had frustrated miners since the 1860s with copper locked in fine particles that no one could economically extract. In 1955, the Copper Range Company opened the White Pine mine and finally solved the problem with modern milling technology. White Pine thrived for four decades, mining copper sulfides rather than native copper, and became the last major copper mine in the state. It shut down in 1995. An attempt at in-situ acid leaching sparked a confrontation when Bad River Band members blockaded rail shipments of sulfuric acid, and regulatory hurdles ultimately made the project uneconomical. The mine closed for good, and Michigan's copper story - stretching from stone-tool pits 7,000 years old to modern industrial operations - finally went quiet.