Greenstone Ridge Trail
| Greenstone Ridge Trail | |
|---|---|
| Length | 40 miles (64 kilometres) |
| Location | Michigan |
| Use | Hiking |
| Elevation gain/loss | 1,555 m (5,102 ft) |
| Difficulty | Medium |
The Greenstone Ridge Trail is a 40-mile-long (64 km) hiking trail on Isle Royale, in Lake Superior, northern Michigan. The island is within Isle Royale National Park.
There are no roads on the island, a wilderness area and national park, so the trail doubles as the primary means of land transportation across the island.