Isle Royale National Park · Michigan

Rock Harbor Trail

11 mi of trail, end to end · about 400 ft of climbing · 604 ft–771 ft

CampgroundsVisitor centersBoat launches

612 ft 618 ft · 6.8 mi high 636 ft

Along the way Three Mile Daisy Farm Rock Harbor Three Mile Rock Harbor Visitor Center

Explore Raspberry Island the Park Service's write-up

2-6 Hours · no dogs · Spring, Summer, Fall

Start Raspberry Island

A bog surrounded by conifers on Raspberry Island.
This fragile bog can be found on Raspberry Island. Photo: NPS / Paul Brown

About this Trail

Mileage: About 1 mile

Rocks and roots on trail

Boardwalks slippery when wet

Trailhead

Raspberry Island Dock

Raspberry Island is just a short canoe or boat ride away from Rock Harbor on the east end of Isle Royale National Park. Venture across the Rock Harbor channel to explore the boreal forest, a fragile bog, and scenic rocky shores. Paths and planked bridges lead past many unusual plants; including the insect-eating sundew and pitcher plants that thrive in the acidic bog environment. Interpretive signs along the route explain the ecology of this island’s rich and varied plant life and the geologic origins of its rugged shores. Take your time and you will discover enough variety on this island to keep you intrigued for half a day. Raspberry Island is accessible by Rock Harbor Lodge tours , private vessel, or watercraft rental from Rock Harbor Marina . Rental and tour fees vary.

Found Nearby

Rock Harbor

Rock Harbor Lodge

Rock Harbor Marina

Accessibility Raspberry Island is accessible by private boat, vessel rental, or tour on the MV Sandy . Docking is available for private boats. A small canoe/kayak landing is available. Trails on Raspberry Island are 18 inches wide and unpaved. Boardwalks are also 18 inches wide. Boardwalks may have water on them, tread carefully.

This hike on nps.gov

Hike the Tobin Harbor Trail the Park Service's write-up

2-4 Hours · no dogs · Spring, Summer, Fall

Start Tobin Harbor Trail at Isle Royale National Park

A trail winds through moss and a forest.
The Tobin Harbor Trail's easy footing makes for smooth hiking into Rock Harbor. Photo: © KAITLYN KNICK

About this Trail

Mileage: About 3 miles

Rocks and roots on trail

Trailheads

Rock Harbor

Windigo via Greenstone Ridge Trail

The Tobin Harbor Trail connects the Rock Harbor area with the Mount Franklin Trail. The Mount Franklin Trail gives access to Mount Franklin, Suzy's Cave, Three Mile Campground, Lane Cove Campground, and the Greenstone Ridge Trail. Some backpackers and day hikers prefer the Tobin Harbor Trail over the Rock Harbor Trail because of the Tobin Harbor Trail's smoothness and gentle grade.

At the junction with the Mount Franklin Trail the Tobin Harbor Trail winds gently downhill through boreal forest until it meets Tobin Harbor. The remainder of the trail continues on a general downward slope hugging Tobin Harbor. This trail ends near the Rock Harbor Lodge in the Rock Harbor area.

Found Nearby

Rock Harbor

Rock Harbor Campground

Three Mile Campground

Suzy's Cave

Mount Franklin

Lane Cove Campground

Accessibility The trail is about 18 inches wide and is not paved. The trail is covered in rocks and roots.

This hike on nps.gov

Hike to Suzy's Cave the Park Service's write-up

2-6 Hours · no dogs · Spring, Summer, Fall

Start Suzy's Cave

Looking out of Suzy’s Cave sunlight falls on vegetation.
Sun beams fall upon vegetation just outside Suzy’s Cave. Photo: © ROBERT SWANSON

About this Hike

Mileage: about 3.8 miles (via Rock Harbor and Tobin Harbor Trails)

Rocks and roots on trail

Trailheads

Rock Harbor

Windigo via Greenstone Ridge Trail

Spend a day exploring Suzy's Cave on Isle Royale National Park. Follow the Rock Harbor Trail 1.8 miles beyond the Rock Harbor Campground and turn inland at the wooden post directing you to Suzy’s Cave . Discover an inland sea arch, formed by wave action some 4000 years ago when lake water levels were higher. From here the trail leads on to the gentler Tobin Harbor Trail, which loops back to Rock Harbor . As you meander through a thick canopy of spruce, fir, and birch, watch moose and other wildlife.

Found Nearby

Rock Harbor

Rock Harbor Campground

Three Mile Campground

Rock Harbor Lodge

Accessibility The trail is about 18 inches wide and is not paved. The trail is covered in rocks and roots. Choose your own adventure: the Rock Harbor Trail is significantly more challenging than the Tobin Harbor Trail.

This hike on nps.gov

All 44 trails in Isle Royale National ParkFind a trailOn the parks mapPark on nps.gov

About this trail's facts

The lines are the National Park Service's public trails layer, the trailheads and the waterfalls, views, peaks and historic places along them the Service's public points of interest, read 2026-10-16 and simplified for the map; the length is the line's, end to end. The write-ups are the Service's own "things to do" text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the park's own site before you go.