Acadia camping is not a first-come system and it is not a rolling booking window. It is a set of scheduled drops at 10 a.m., and if you do not know which morning yours is, you will find everything gone.
The mechanism
“For Blackwoods, Seawall and Schoodic Woods campgrounds, starting on Dec 1, 90 percent of campsites are released six months in advance on the first of each month at 10 am EST. The remaining 10 percent are released at 10 am 14 days ahead of a desired arrival date on a rolling basis.”
The Park Service’s own worked example, which is clearer than any paraphrase:
“if you plan to arrive on May 20, you can make an online reservation starting at 10 am Dec 1 from the first release, or starting at 10 am May 6 from the second release.”
The critical detail is that this is monthly, not rolling.
“campground reservations for the month of May 2025 will be available on December 1, 2024, at 10 am EST. Campground reservations for the month of June 2025 will be available on January 1, 2025, at 10 am EST, and so on.”
So you are not competing with everyone who wants 20 May. You are competing with everyone who wants any night in May, all of them at 10 a.m. on 1 December.
Which month opens when:
| Arrival month | On sale, 10 a.m. EST |
|---|---|
| May | 1 December |
| June | 1 January |
| July | 1 February |
| August | 1 March |
| September | 1 April |
| October | 1 May |
This window is new — “Starting in 2025, reservations for Blackwoods, Seawall, and Schoodic Woods campgrounds in Acadia National Park will be available four months earlier than before.” Advice written before 2025 has the wrong window.
The second chance is 14 days out, also at 10 a.m., for the remaining 10 percent. That is a genuine release and not just cancellations.
No walk-ups, and no booking at the office: “Reservations cannot be made through the campground office or in-person.”
The third chance is a cancellation. The Park Service’s camping page says “Visitors are able to make same day reservations online at Recreation.gov if campsites are available.” Sites that free up are sold online, on the day, to whoever is watching.
Duck Harbor is a completely different animal
“For Duck Harbor Campground on Isle au Haut, all reservations will be released at 10 am April 1 for the entire season.”
One morning, one drop, the whole year.
And the limits are severe:
- Three nights per year, total. Not per trip — per year.
- One reservation at a time.
- Five campsites. “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 is no water: “There is no potable water source at Duck Harbor Campground. Plan ahead to treat the water or bring enough potable water for the duration of your stay.” And the nearest source is not dependable — “There is a non-potable water source 0.3 miles from campground, however it may not be available during your stay.”
Five lean-tos on an island, three nights a year, one release. It is the hardest reservation in the park and the one people have heard least about.
The four campgrounds in 2026
| Campground | Opens | Closes | Sites | Per night | Notes |
|---|---|---|---|---|---|
| Blackwoods | 1 May | 19 Oct, 10 a.m. | 281 | $30 — $60 | Closest to Bar Harbor |
| Seawall | 20 May | 12 Oct, 10 a.m. | 178 | $22 — $60 | Quiet side of the island |
| Schoodic Woods | 20 May | 12 Oct, 10 a.m. | 90 | $22 — $60 | The only one with hookups |
| Duck Harbor, Isle au Haut | 19 June | 5 Oct | 5 | $20 | Five lean-tos, boat access |
Opening and closing dates are the Park Service’s hours table. Site counts and nightly prices are Recreation.gov’s campground records; the price depends on the site you pick within that range.
The 2027 opening dates are not posted yet, but the release calendar does not wait for them: May 2027 nights go on sale on 1 December 2026. Until the Park Service posts 2027’s, the 2026 dates above are the guide, and Acadia in spring sets them beside everything else that opens between April and June.
Stay limits, and this is not what most people assume. The rule is not 14 nights per booking:
“No individual, in any capacity, may camp in Acadia National Park campgrounds for more than a combined total of 14 nights between the Friday of Memorial Day Weekend and Columbus Day; Camping is limited to 30 nights per calendar year.”
Combined, across every Acadia campground, across the whole high season. Two separate week-long trips in July and September use it up between them, and the 30-night calendar-year cap sits on top of that.
Duck Harbor is stricter again: three nights per year.
On Duck Harbor’s season, Recreation.gov gives the bookable window as “The first night is June 19th and the last night is October 5th.” The Park Service’s hours table lists 17 June. We print the booking system’s date, because that is the one that decides whether you can actually reserve.
Hookups, only at Schoodic Woods: “All sites (except for group sites and hike-in sites) have electric, and B-Loop sites have electric and water.”
No showers anywhere, and Blackwoods is emphatic: “There are no showers in the campground. Fee shower facilities are located 1/2 mile from the campground. The use of portable showers is prohibited.”
If you are in an RV
Schoodic Woods is the answer, for the hookups and because the 21-foot rule shapes everything else about an RV trip here. Seawall takes some RVs up to 35 feet and warns that it was not designed for them.
If you miss both drops
“There is no backcountry camping, ‘out-of-bounds’ camping, overnight parking, or winter camping allowed anywhere in Acadia.”
That is unusually absolute for a national park and it means exactly what it says. The one way in without a reservation made in advance is a same-day reservation on Recreation.gov, when a cancellation frees a site. That matters late in the season: in 2026 Blackwoods stays open until 19 October, and Seawall and Schoodic Woods until 12 October.
If nothing frees up, you are not sleeping in the park — you are finding a bed or a private campground outside it, which is what the lodging page is for.
What we would actually do
Set an alarm for 9:55 a.m. EST on the first of the month, six months out. Have your dates, your site preferences and your payment details already in the browser. The 90 percent release is the one that matters and it does not last.
If you miss it, put the 14-day release in your calendar — 10 a.m., exactly two weeks before your arrival date. Ten percent of a campground is a real number of sites.
If both are gone, watch Recreation.gov for a same-day cancellation on the morning you want. It is the least reliable of the three, and the only one left.
If Duck Harbor is the goal, 1 April is the only morning there is.
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