Pick a site on the map to see its availability calendar.
Only 14 openings in the last 90 days: not enough recent activity for a reliable pattern. A free Campsite Sniper alert watches around the clock instead, and pings you the moment one opens.
Of the 85 tracked site-nights (Sep 18 – Oct 4, 2026): 3 open for online reservation · 82 reserved.
Of the open site-nights on mapped sites, 3 fall on weekdays and 0 on weekends (Fri–Sun).
October is fully reserved. 0 of 20 tracked site-nights are open there — 20 reserved.
| Window | Night | Sites open | Status |
|---|---|---|---|
| Labor Day | SAT Sep 5 | 0 | None open |
| SUN Sep 6 | 0 | None open | |
| MON Sep 7 | 0 | None open |
Labor Day: no online availability on any tracked night.
| Site | Open site-nights |
|---|---|
| 04 | 2 |
| 01 | 1 |
The 2 sites with the most open site-nights in the current snapshot. Pair a bookable date with a free alert to cover everything else.
The next bookable night is Sep 21. Campsite Sniper can watch later dates for you.
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| 04 | Not recorded | None | 2 | 1 night | Sep 24, Sep 28 |
| 01 | Not recorded | None | 1 | 1 night | Sep 21 |
Duck Harbor campsites are reservable starting on April 1st at 10:00am ET. Duck Harbor Campground is located on Isle au Haut, a rugged island off the coast of Stonington, Maine. Remote and inaccessible to automobiles, Isle au Haut is linked to the mainland by mailboat.
Isle au Haut offers excellent hiking. The remoteness of the island provides a quiet experience along primitive trails with many great views of rocky cliffs and coastal scenery. Bicycling is allowed but is very rigorous, on loose rock, and unpaved road. No trail biking. You must bring your own mountain bike. Bicycles can only be unloaded at the Town Dock. No bicycles may be loaded or unloaded at Duck Harbor Landing.
This small campground contains five campsites. Each campsite has a fire ring, picnic table, and a lean-to shelter which is three-sided with roof and floor. Dimensions are 8' tall, 8' deep, and 12.5' wide. Use of tents is limited to what can fit inside the shelters. There are three composting toilets at the campground. There is a non-potable water source 0.3 miles from campground, however it may not be available during your stay. Plan ahead to bring enough water for the duration of your stay. There is a ranger station 4 miles from the campground but only 0.3 miles from the Isle au Haut Town Landing. The ranger station is open mid-May to mid-October, when there are rangers on Isle au Haut for the season. While the rangers are typically out in the field and not at the ranger station during most of the day, the lobby remains open, allowing visitors access to maps, reading material, and the only public restroom in town. Boat service to Duck Harbor is limited at the beginning and end of the season. Please review the Need to Know section .
Isle au Haut provides opportunities to explore rocky shorelines, wooded uplands, marshes, bogs, and a mile-long freshwater lake. A section of Acadia National Park covers about half of Isle au Haut. The campground is situated on the western side of Isle au Haut. It is just south of the Duck Harbor Boat Landing. The island is approximately six miles long by two miles wide.
There is a small, traditional village near the Isle au Haut Town Landing where one can find a general store, seasonal gift shop, a seasonal food shack, and post office.
From the north, take I-95 to Bangor, then I-395 to Brewer, then take Rte. 15 south to Stonington. From the south, take I-95 or I-295 to Augusta, then Rte. 3 to Belfast, then Rte. 15 to Stonington.
View on Recreation.gov ↗ Get directions ↗












Reservations for Duck Harbor Campground are made through Recreation.gov. 96.5% of tracked site-nights are not currently open for online reservation; 3 of 85 remain open. Campsite Sniper has also detected 14 site openings here in the last 90 days, so further dates may appear. Pick a site on the map to see its calendar, or set a free Campsite Sniper alert. You complete the reservation yourself on Recreation.gov.
No. Campsite Sniper sends alerts and direct Recreation.gov links. It never books, pays for, holds, hoards, or resells reservations.
Campsite Sniper re-checks public Recreation.gov availability for this facility every hour and republishes whenever anything changes. This facility's data last changed at Sep 18, 2026 16:19 UTC; an older timestamp means nothing has changed since that time, not that checking stopped. Always confirm final availability on Recreation.gov when you book.
Campsite Sniper detected 14 site-date openings at Duck Harbor Campground in the last 7 days, 14 over 30 days and 14 over the last 90.
September 2026, with 3 open site-nights in the current snapshot of 65.
As of the Sep 18, 2026 snapshot: the next open date is Mon, Sep 21. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
Lakefront, hookups, your RV length, weekends only - set it as picky as you want.
We run paced availability checks for Duck Harbor Campground. One watch covers every matching site.
When a match opens, you get a push with a Recreation.gov link so you can review and book it yourself.