Five sites. That is the entire campground. And you cannot drive to any of them.
Duck Harbor Campground sits on Isle au Haut, a rugged island twelve miles off the coast of Stonington, Maine. No cars. No RVs. No camp store. Just five lean-to shelters and a lot of quiet. As of 2026, it remains one of the most unusual camping options within Acadia National Park precisely because it feels completely separate from the rest of the park. This guide covers exactly what you need to know to book a site, get there, and make the most of a stay that requires more planning than your average car-camping trip.
For more, see Campsites at Schoodic Woods Campground (2026 Guide). For more, see Acadia National Park Scenic Drives: Acadia Trails Drive (2026) and Acadia National Park: Acadia Hiking Boots (2026 Guide). For more, see Best Guided Tours of Acadia National Park and Wildlife Near Acadia National Park. For more, see Acadia National Park Weather and Best of Acadia National Park: Best Time (2026). For more, see complete visitor guide, all campgrounds, hiking trails, lodging and accommodations, and Blackwoods Campground at Blackwoods Campground Acadia National.If you are new to the park's less-visited areas, start with the complete visitor guide before diving into the logistics. For a full rundown of every camping option in the park, the all campgrounds page covers the full range.
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Getting to Duck Harbor Campground: The Mailboat Is Your Ride
The single most important thing to understand about Duck Harbor Campground is that you cannot drive there. The Park Loop Road, Cadillac Summit, and the bustling village of Bar Harbor? That is a different world. Duck Harbor is on Isle au Haut, and Isle au Haut is accessed only by boat.
The Isle au Haut mailboat departs from Stonington, Maine. Stonington is roughly 75 miles southwest of Bar Harbor, a drive of about 90 minutes on Route 15. The mailboat is a working ferry that carries passengers, mail, and supplies to island residents. It also carries campers.
Key logistics:
- The mailboat runs year-round but schedules vary significantly by season
- Round-trip fare applies per passenger
- Reservations are recommended during summer months
- The boat lands at the town of Isle au Haut, roughly five miles from Duck Harbor
- You either hike or bicycle those five miles - no vehicle transport on island
Most visitors underestimate the travel time from the main park area to the campground. The research data shows the physical address for Duck Harbor Campground is PO Box 177, Bar Harbor, ME 04609, but that is a mailing address. The actual location is a three-hour travel window from Bar Harbor when you factor in the drive to Stonington and the boat crossing.
Rangers will tell you to treat the entire travel day as part of the experience. Do not try to rush it.
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What You Actually Get: Five Lean-To Shelters
The campground itself is straightforward. Five sites, each with a three-sided lean-to shelter. No hookups. No showers. No electrical. No dump station.
The fee as of 2026 is $20.00 per night for a tent or shelter site, with a maximum of six people per site. That is a good value by any standard, especially given the isolation. But the trade-off is that you need to bring everything you need for the duration of your stay.
What the lean-tos include
- A wooden floor and roof with three walls
- Space for sleeping bags and gear
- Some protection from wind and rain
What they do not include
- Mattresses or pads
- Screens or bug netting
- Cooking equipment or utensils
- Storage for food (bear-proof containers are your responsibility)
The park service recommends bringing a ground tarp, a sleeping pad, and a stove. Open fires may be restricted depending on conditions. Check current fire regulations before you pack.
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What to Do Once You Are There
Duck Harbor Campground is a launch point for exploring Isle au Haut, not a destination in itself. The island has roughly 18 miles of hiking trails, most of them moderate in difficulty. The terrain is rocky and forested, with sections of exposed coastline that rival anything on Mount Desert Island.
Hiking on Isle au Haut
The island trails connect the campground to the town landing, the lighthouse at Robinson Point, and several shoreline loops. The western side of the island is part of Acadia National Park; the eastern side remains a working community with year-round residents.
- Duck Harbor Mountain Trail - short but steep, with views of the harbor
- Western Head Trail - follows the coast, good for birding
- Robinson Point Trail - leads to the lighthouse and open ocean views
Keep an eye out for bald eagles and osprey along the shore. The island sees fewer visitors than the main park, so wildlife is less accustomed to people.
Paddling
The research data notes that Duck Harbor Campground is a good launch point for paddling excursions. The protected waters around Isle au Haut offer options for kayakers and canoers with experience in coastal conditions. Tides and currents matter here. Check tide charts before you go.
What not to expect
- No Island Explorer Bus serves Isle au Haut. That service is limited to Mount Desert Island
- No restaurants or stores on the park side of the island
- Cell service drops out well before you reach Stonington - plan accordingly
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Booking and Reservations: The Five-Site Problem
Duck Harbor Campground operates on a reservation system. With only five sites available, spots fill quickly for the summer months. The window opens on a rolling basis, typically several months in advance.
If you are flexible on dates, consider shoulder season. May and September offer cooler temperatures, fewer crowds, and better odds of securing a site. The peak weeks from mid-July through August are the hardest to book.
Reservations are handled through Recreation.gov along with the rest of Acadia's campgrounds. The system allows you to search by date and site type.
What happens if you do not have a reservation
The answer is simple: you cannot camp at Duck Harbor. There is no first-come, first-served option. Walk-up camping is not permitted. If you arrive on the island without a reservation, you need to return on the same boat.
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Packing List and Practical Advice
This is not a campground where you can buy what you forgot. The mailboat does not run hourly, and the nearest store is in Stonington on the mainland. Pack carefully.
Essentials
- Potable water - bring enough for cooking, drinking, and cleaning
- Stove and fuel - no open fires may be permitted
- Sleeping pad and bag rated for coastal temperatures
- Rain gear - Isle au Haut gets regular precipitation year-round
- Bear-proof food container - required by park regulations
- Flashlight or headlamp - no artificial lighting at the campground
- First aid kit - the nearest medical facility is on the mainland
What to leave behind
- Large coolers - impractical to carry on the mailboat and hike to camp
- Excessive gear - you carry everything from the boat landing five miles
- Firewood - do not transport wood across water due to invasive species
The elevation gain from the boat landing to the campground is modest, but the five-mile walk with a full pack will test your fitness. Pack extra water for this stretch.
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Seasonal Considerations
The research data indicates activities are best in spring, summer, and fall. Winter access is possible but significantly more challenging. The mailboat runs reduced schedules, and trails may be icy or snow-covered.
Spring (May-June)
- Cool temperatures, 40s to 60s
- Muddy trails in sections
- Fewer visitors
- Bug season begins in late May
Summer (July-August)
- Peak temperatures, 60s to 80s
- Highest demand for campsites
- Stable weather but afternoon storms possible
- Mosquitoes and black flies active
Fall (September-October)
- Cool and crisp, 40s to 60s
- Fewer crowds after Labor Day
- Foliage peaks in early October
- Daylight hours shorten noticeably
Early morning is your best bet for photographs along the western shore. The light angles across the island in a way that softens the granite and highlights the pine.
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How Duck Harbor Compares to Other Acadia Campgrounds
The research data lists four campgrounds in Acadia National Park: Blackwoods, Seawall, Schoodic Woods, and Duck Harbor. They are not interchangeable.
Duck Harbor is the only one that requires a boat to reach. It is the only one with five sites. It is the only one on Isle au Haut. If what you want is a shower, a nearby restaurant, and easy access to Cadillac Mountain, choose Blackwoods or Seawall. If what you want is genuine solitude and the sense that you have earned your stay through effort, Duck Harbor is the answer.
The park service recommends a minimum two-night stay at Duck Harbor to justify the travel time. Three nights is better.
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Practical Takeaways
- Reservations are required and available through Recreation.gov - book early
- The mailboat from Stonington is the only way to reach the island
- Hike or bike five miles from the town landing to the campground
- Bring all water, food, and gear - no supplies available on site
- Pack for rain and cool temperatures regardless of the forecast
- Limit your stay to what you can comfortably carry in one trip
- 2026 fees are $20 per night for a tent or shelter site, max six people
- Check current NPS alerts before departure - peregrine falcon closures and trail conditions change throughout the season
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Final Thoughts
Duck Harbor Campground is not for everyone. The travel logistics alone will filter out most casual visitors. But for the small number of people who make the effort, it offers something the rest of Acadia largely cannot: silence. Real, sustained silence, with nothing but wind, water, and the occasional bird.
If you want to say you have camped in Acadia National Park without spending your stay listening to generators and neighbors, this is the site for you. Just plan well, pack light, and give yourself enough time to sit still once you arrive.
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For more information, see our complete Acadia National Park Guide.