Parking
Reach Rock Harbor by passenger boat, seaplane or private boat. From Rock Harbor Lodge, follow the path toward the Tobin Harbor dock; there is no drive-up trailhead parking.

Isle Royale National Park, MI
Harbor islands and an inland sea arch off an easy woodland walk
Overview
Map & elevation
Plan your hike

The highest, rockiest slopes around here are a summer buffet for grizzly bears.
Isle Royale Tour Guide
Parkwolf is a GPS audio tour guide for Isle Royale National Park. As you drive, it chimes in with what’s ahead: hidden gems, upcoming stops, history, geology, and wildlife, right through your car’s speakers.
Recorded for this area
Rock Harbor Lodge and Scoville Point“You're approaching Rock Harbor Lodge, a useful stop for a hot meal even if you're not staying overnight. Greenstone Grill serves pizza, burgers and sandwiches, with a deck overlooking the harbor.”
Plays on the road 0.1 mi from the trailhead in the Parkwolf Isle Royale Tour Guide.
More stories near here in the app
Trail guide
Tobin Harbor Trail is a roughly 3-mile point-to-point walk from the Tobin Harbor dock path by Rock Harbor Lodge to the Mount Franklin Trail area near Three-Mile Camp. Allow two to four hours for the one-way walk. It is a connector, not a loop: retracing it makes an outing of about 5.9 miles. The Rock Harbor return is listed at 6.3 to 6.5 miles, while the Suzy's Cave cutoff makes a shorter circuit of about 3.8 miles. Check the current island map for the loop you choose. At the far end, the mapped Tobin and Mount Franklin paths are slightly offset; follow the marked connection on the ground.
The route rolls gently rather than making a major climb, and much of it sits in shade under birch, spruce and fir. The unpaved tread is only about 18 inches wide and has rocks and roots, so it is easy in grade but slow underfoot. Sturdy walking shoes make sense here.
The trail follows Tobin Harbor and opens onto views of its small islands. When a view opens, frame a near island with a slice of shoreline so the picture shows the shape of the harbor. Around halfway, an inland cutoff leads to Suzy's Cave, a sea arch formed when Lake Superior stood higher; it is a separate side trip, not the end of this trail.
Reach Rock Harbor by passenger boat, seaplane or private boat, then follow the path toward the Tobin Harbor dock by the Lodge. This is a boat-and-foot access, not a drive-up trailhead. Seasonal Greenstone Grill and Lighthouse Restaurant are near the Lodge, separate from the walk. There is no trail activity fee or reservation requirement, though park entrance fees may apply. The listed hiking season is spring through fall. Pets are not allowed.
Wildlife
308 sightingsMooseMost seen around 8 PMSighting map
93 sightingsWolfMost seen around 8 PMSighting map
77 sightingsBald EagleMost seen around 5 PMSighting map
150 sightingsLoonMost seen around 7 AMSighting map
24 sightingsTrumpeter SwanMost seen around 6 PMSighting map
71 sightingsBeaverMost seen around 8 PMSighting mapSighting maps show where each species has been reported across Isle Royale. Wildlife moves, so no sighting is guaranteed.
Keep exploring
ChallengingHarbor to Hills Loop33.2 mi · 1.3 days · 0.1 mi awayA 33-mile island loop climbs from Lake Superior shore to Greenstone Ridge.
ModerateScoville Point Loop4.2 mi · 3 hr · 0.1 mi awayA rough lakeshore and wooded harbor side meet at Scoville Point.
ModerateSuzy’s Cave Loop3.8 mi · 3.5 hr · 0.1 mi awayA rocky shoreline loop to Isle Royale’s inland sea arch.
ModerateRock Harbor Trail11 mi · 7 hr · 0.1 mi awayAn 11-mile rocky shoreline hike from Rock Harbor to Moskey Basin.
ModerateStoll Memorial Trail (Short Loop)1.8 mi · 1.5 hr · 0.1 mi awayA wooded and rocky interpretive loop near Rock Harbor.
ModerateTobin–Duncan Portage Trail1.6 mi · 1.5 hr · 0.5 mi awayA steep, boat-accessed crossing over Greenstone Ridge.
EasyRaspberry Island Trail0.9 mi · 45 min · 0.6 mi awayBoardwalks lead into a tiny bog before the rocky shore.
ModerateLookout Louise Trail2 mi · 1.3 hr · 1 mi awayA rocky climb past Monument Rock opens over Duncan Bay.
Visitor center · 0.1 mi awayRock Harbor Visitor CenterA smart first stop for ranger answers and island trip planning.
Sight · 0.1 mi awayRock Harbor MarinaFuel, rentals and dock services in a remote island harbor.
Restroom · 0.1 mi awayRock Harbor Comfort StationSeasonal toilets, showers and laundry in Rock Harbor.
Store · 0.1 mi awayRock Harbor StoreGroceries, fuel and gear before you leave the main dock.
Restaurant · 0.2 mi awayGreenstone GrillA hot meal and harbor-view deck after a day on the island.
Restaurant · 0.2 mi awayLighthouse RestaurantA sit-down meal at Rock Harbor, far from the mainland.
Lodging · 0.2 mi awayRock Harbor LodgeStay beside Lake Superior at the island's only full-service lodge.
Campground · 0.2 mi awayRock Harbor CampgroundA busy harbor base with campsites close to ferries and trailheads.Parkwolf’s Isle Royale ranking