No permit beyond Isle Royale's entrance fee ($7 per person per day; children 15 and under free). Reservations for MV Sandy tour are recommended; book through Rock Harbor Lodge.

Bring 1.5–2L water (no potable water on the island), hiking boots with good grip, rain jacket, sunscreen, bug spray (especially July–August), and a camera. The boat crossing can be rough—bring motion sickness prevention if prone.

Raspberry Island - 1mi Easy Bog Boardwalk

Q: Is the boardwalk safe when wet?

It can be slippery. Tread carefully and deliberately. Wear hiking boots with good tread. The planks are narrow (18 inches), so don't rush. If rain is heavy or ongoing, postpone your visit—slick planks are a genuine hazard.

Q: Can I do this if I'm not very fit?

Yes. It's 1 mile, flat, and on a boardwalk. Even casual walkers finish in 1–2 hours on the boardwalk alone. The boat ride is the real challenge—some people get seasick on the Lake Superior crossing from Rock Harbor.

Q: Is this trail lonely? Can I get help if injured?

If you're on a guided MV Sandy tour, help is nearby and the crew provides safety oversight. If solo on a rental vessel, you're isolated. Carry a satellite communicator and tell someone your planned return time.

Q: When is the best time to see the plants?

June–August when sundews and pitcher plants are in bloom and most visible. July–August peak, but bugs peak too. June offers slightly lower bug pressure. September is quiet but plants fade.

Distance

1 mi

Est. Time

2–3 hours. Guided MV Sandy tours are 2.5 hours round-trip including boarding and return. Self-guided boardwalk walk alone takes 1–2 hours; add boat transportation and wait times.

Route Type

Out-and-back on boardwalk

Dogs Allowed

Best Season

Spring, Summer, Fall (April 16–October 31). Optimal: June–September when transportation services run and weather is most stable.

Overview

About This Trail

This is a gentle 1-mile boardwalk through a fragile spruce bog—no lung-busting climbs, just careful footing and raw nature. You'll encounter insect-eating sundews and pitcher plants thriving in acidic conditions, scenic rocky shores, and boreal forest. The boardwalks are narrow (18 inches) and slippery when wet, so tread deliberately. Access requires a boat ride from Rock Harbor or a reserved seat on the MV Sandy tour.

Highlights

Difficulty Level

Walk in the park

Trail Highlights

Rare bog ecosystem with carnivorous plants impossible to see elsewhere. Close-up views of geologic formations and a fragile wetland most visitors never experience. Suitable for naturalists and casual hikers seeking unique flora.

Insider Tips

• Best views of sundew and pitcher plants are right along the boardwalk—no need to scramble off-trail. Focus your camera work at Mile 0.5. • Read interpretive signs carefully; they explain bog ecology and are the real educational payoff most hikers rush past. • Depart Rock Harbor by 8 AM for private vessels or book the first MV Sandy tour (typically 9–10 AM) to avoid afternoon crowds and rain. • If boardwalks are very wet, pace slows to 0.5 mph; budget 3+ hours for wet conditions. • Bring a zoom lens; pitcher plants and sundews are small—binoculars or macro photography reveals details day visitors miss.

Best Season to Hike

Spring, Summer, Fall (April 16–October 31). Optimal: June–September when transportation services run and weather is most stable.

Hiking Tips

Wear hiking boots with grip—boardwalks are slippery when wet. Tread carefully on wet planks.
Bring 1.5–2L water minimum; bog water is acidic and not drinkable.
Tuck pants into socks July–August to prevent bug bites if visiting peak bug season.
Move slowly and deliberately; narrow boardwalks (18 inches) demand focus, not speed.
Check weather before departing Rock Harbor; boat crossing can be rough in wind.
Read interpretive signs—they explain bog ecology and are the real payoff.

Family Info

Good for families if children can balance on narrow (18-inch) boardwalks. Wet planks can be slippery—hold hands with younger kids. No big scrambling, drop-offs, or technical terrain makes this safer than most Isle Royale trails. Keep kids close on narrow sections; distractions can lead to slips.

What Hikers Say

Hikers say Raspberry Island is one of Isle Royale's most accessible and unique trails. The bog boardwalk offers close-up views of rare insect-eating plants and is suitable for families and casual visitors. Most say the boat ride to and from Rock Harbor is half the adventure—and half the challenge.

Details

Trail Specifications

Distance: 1 miles

Duration: 2–3 hours. Guided MV Sandy tours are 2.5 hours round-trip including boarding and return. Self-guided boardwalk walk alone takes 1–2 hours; add boat transportation and wait times.

Difficulty: Walk in the park

Route Type: Out-and-back on boardwalk

Surface: Boardwalk (18 inches wide, unpaved planks) and narrow trails (18 inches wide). Boardwalks may have water pooling on them and are slippery when wet. Rocks and roots present on some narrow trail sections.

Getting There

Trailhead: Raspberry Island Dock (accessible by boat from Rock Harbor Marina, east end of Isle Royale National Park)

Requirements

Permit Required

No additional permits required. Isle Royale entrance fee ($7 per person per day; children 15 and under free) covers access to all trails including Raspberry Island. Reservations for MV Sandy tour are recommended and made through Rock Harbor Lodge.

Fees: Isle Royale entrance: $7 per person per day (children 15 and under free). MV Sandy tour and vessel rental fees vary; contact Rock Harbor Lodge or Marina for pricing.

Shuttle Required

Private boat, vessel rental from Rock Harbor Marina, or guided tour on MV Sandy from Rock Harbor Lodge. MV Sandy tours run daily May–September (2.5-hour round-trip). Rental and tour fees vary. Reservations for MV Sandy available through Rock Harbor Lodge.

Trail Rules

Dogs: No. Pets are not permitted on Isle Royale trails or campgrounds.

Biking: No. Boardwalks and narrow trails (18 inches wide) are designed for foot traffic only.

Trail Markers: Well marked. Continuous boardwalk is easy to follow. Interpretive signs guide the route and explain bog ecology. No map required for navigation.

Trail Features

Conditions & Safety

Water: Bring all water from Rock Harbor. Bog water is acidic (pH ~4–5) and not potable. No potable water sources on Raspberry Island; must carry minimum 1.5L from the mainland.

Shade: Partial shade. Spruce bog offers tree cover in sections, but boardwalk stretches are exposed. Wind and sun exposure likely; wear sunscreen and a hat.

Cell Service: Minimal to none. Verizon spotty near Rock Harbor; assume no signal once on the island. Carry a satellite communicator if traveling solo or renting a private vessel.

Hazards:

Boardwalks are slippery when wet; tread carefully and move deliberately. Planks are narrow (18 inches) and may have water pooling; drop-offs possible on either side. Bog water is acidic and not drinkable—dehydration risk if you forget water. The boat crossing from Rock Harbor can be rough in wind conditions; dress for spray and wind. Isolation on the island means help is limited if injury occurs; guided tours mitigate this risk.

Emergency: Isle Royale National Park Ranger Station (Rock Harbor): available during summer season. MV Sandy crew provides safety oversight on guided tours. In emergencies, use satellite communicator or signal the return boat. No on-island emergency services.

Crowd Info

Typical Crowds: Moderate. Guided MV Sandy tours attract groups, but the 1-mile boardwalk disperses crowds quickly. Early-morning departures offer quieter conditions.

Peak Times: Midday (11 AM–3 PM) during July–August. MV Sandy tour schedules peak on sunny weekends and holidays.

Accessibility & Family

Accessibility:

Boardwalk is flat and unpaved (18-inch-wide planks, slippery when wet). Narrow clearance on both sides. No scrambling, climbing, or steep sections. Not wheelchair-accessible. Suitable for people with moderate mobility and balance; not safe for those unable to maintain careful footing on wet, narrow planks.

Family Notes:

Nearby Facilities

Rock Harbor Lodge (meals, lodging, supplies), Rock Harbor Marina (watercraft rentals, supplies). Main Park Visitor Center at Rock Harbor. Houghton, Michigan (mainland, 45+ minutes by ferry) has grocery stores and full services.

What Hikers Say

FAQs

Are there bears on Raspberry Island?

Unlikely. The fragile bog ecosystem doesn't support bears; they prefer mainland trails. Carry bear spray anyway per Isle Royale wildlife protocol, but encounters here are extremely rare.

Is the boardwalk safe when wet?

Can I do this if I'm not very fit?

Do I need a permit?

Is this trail lonely? Can I get help if injured?

What should I bring?

When is the best time to see the plants?