Introduction
Isle Royale is an archipelago in Lake Superior accessible only by ferry or seaplane — no bridges, no roads, no cars. It's the most remote national park in the lower 48 and consistently one of the least visited, receiving fewer annual visitors than some state parks receive in a weekend. The island has a self-contained ecosystem famous for its predator-prey relationship between wolves and moose — studied continuously since 1958 in the longest running predator-prey study in the world.
Getting There
Ferries depart from Houghton and Copper Harbor in Michigan and Grand Portage in Minnesota. The Ranger III from Houghton takes 6 hours (the classic way). The Isle Royale Queen IV from Copper Harbor takes 3.5 hours. Seaplane service is available from Houghton for premium pricing. Boats dock at Rock Harbor (east end) or Windigo (west end). Plan ferry logistics carefully — schedules are limited and booking far in advance is essential.
The Greenstone Ridge Trail (40 miles)
The backbone of Isle Royale, the Greenstone Ridge Trail runs the length of the island from Windigo (west) to Lookout Louise near Rock Harbor (east). The trail follows the highest ridge of the island, offering views of interior lakes, Lake Superior, and on clear days, the distant shores of Ontario. The ridge is rocky and rooty but well-marked.
Most hikers complete the traverse in 4–6 days, averaging 7–10 miles per day with significant pack weight. The route can be done in either direction; the prevailing winds favor west-to-east. Key highlights include Mount Ojibway (the highest point on the island at 1,136 feet), Chickenbone Lake, and the series of interior lakes along the route.
Wildlife
Isle Royale has one of the highest moose densities in North America — sightings are virtually guaranteed if you spend multiple days on the island. The wolf population is small and rarely seen by hikers, but tracks, howls, and occasional distant glimpses are possible. Loons call across every lake. The island has no bears, no rattlesnakes, and no poison ivy — an unusually hiker-friendly wilderness.
Camping & Permits
Camping at designated shelters and tent sites along the Greenstone Ridge Trail is free with park entry. A permit is not required for camping but you must register your itinerary with park rangers before departing from Rock Harbor or Windigo. Campfires are allowed in fire rings at established sites. All water must be filtered — treat even the crystal-clear lake water for giardia.
Practical Notes
Isle Royale has no resupply options on the trail. Carry all food for your entire trip. Rock Harbor Lodge has a camp store at the east end and Windigo has a small supply point at the west end — stock up before heading onto the ridge. The ferry schedule is non-negotiable: missing your boat means waiting days for the next one. Build buffer days into your itinerary.
