Isle Royale, Island in Lake Superior, Michigan, United States

Isle Royale is a 45-mile (72 km) long, 9-mile (14 km) wide island in the northwest of Lake Superior, part of Michigan. Ridges such as Greenstone Ridge run southwest to northeast, with Mount Desor reaching 1,394 feet (425 m). Its shoreline is cut by inlets and channels, and Siskiwit Lake lies inland.

Native peoples from regions west and north of the lake mined copper here over many centuries, leaving pits that remain visible today. Europeans explored the island from the 17th century onward, but permanent settlement never took hold.

The name comes from French and means royal island, a reference to early European explorers who passed through these waters. Visitors today follow footpaths that wind through dense forest and stay in simple cabins or campsites along the shore.

Ferries and seaplanes bring visitors to the island between May and September, while it closes from November through April. Those planning to hike should bring sturdy footwear and gear for changing weather, as shelters are spaced far apart.

The island sits closer to the Canadian shore than to the American side, yet belongs politically to Michigan. Moose and wolves live here with no natural land connection, forming a biological system that researchers have watched for decades.