Place · 0.5 mi away
Overview
Suzy’s Cave is a small but memorable stop: an inland sea arch carved by ancient wave action when Lake Superior stood much higher about 4,000 years ago. It sits between Rock Harbor and Three Mile Campground, making it a popular, easy add-on for anyone based in Rock Harbor.
The Hike
Most visitors reach it via the Rock Harbor Trail or the gentler Tobin Harbor Trail, with a short 0.2-mile spur to the cave. From Rock Harbor, it’s about 1.8 miles one way. Many hikers turn it into a roughly 3.8-mile loop—out on the rugged Rock Harbor side and back on the smoother Tobin Harbor tread. Expect classic Isle Royale terrain: rocks, roots, and stretches of dense spruce–fir–birch forest with glimpses of water.
Why It’s Unique
Unlike most arches you’ll find hugging active shorelines, this one sits inland—proof of how dramatically Superior’s levels have shifted since the last glacial period. It’s compact, photogenic, and a tidy geology lesson you can experience without committing an entire day.
Wildlife
Keep your eyes and ears open for loons and other birds along the forested corridors and sheltered waters. Moose are spotted in the area as well—thrilling when it happens, and a good reminder to give wildlife ample space.
What to Know
This is a natural point of interest, not a developed site. There are no restrooms, water, picnic tables, or other services at the cave. Rock Harbor and nearby campgrounds are where you’ll find facilities. The Rock Harbor Trail can be slow-going thanks to rocks and roots, and it becomes slick after rain—sturdy footwear pays off.
Best Time to Visit
It’s a pleasant outing any time of day, but the trail often feels especially tranquil during off-peak hours and at dusk. If you want solitude, aim for early or late. Weather changes quickly here; be ready for rain and wind even on seemingly stable days.
Make the Most of It
Pair the cave with a loop hike: take the rugged Rock Harbor Trail one direction and the smoother Tobin Harbor Trail the other. Bring water, a snack, and bug repellent in summer, and keep your camera handy for the arch and any wildlife that wanders by.
Pros
- Rare inland sea arch formed by ancient Lake Superior waves
- Short hike from Rock Harbor with an easier Tobin Harbor return option
- Possibility of moose and loon sightings along the way
Cons
- Rocky, rooty footing on Rock Harbor Trail; slick after rain
- No on-site facilities; water and restrooms only at Rock Harbor or campgrounds
- Mosquitoes can be bothersome in summer
Tips
- Hike it as a loop: rugged Rock Harbor out, smoother Tobin Harbor back.
- Pack insect repellent in summer; forested stretches can be buggy.
- Carry water and snacks—there are no services at the cave.
- Wear sturdy shoes; rocks and roots make footing uneven, especially after rain.
- Give any moose you see plenty of space and observe from a distance.
