Best Time to Visit Acadia National Park: Seasons, Fall Foliage and 2026 Closing Dates

Short answer: for most trips, the best time to visit Acadia National Park is September to mid-October. Roads, visitor centers and campgrounds are still open, it is outside the July–August peak that the National Park Service calls “extremely congested” on the Park Loop Road, and the NPS says fall color usually peaks in mid-October (anywhere from the first to the third week). Pick late June to August if you want the fare-free Island Explorer buses, every facility open and the warmest weather, and expect heavy traffic. Pick December to mid-April only for quiet snow walks and skiing: most of the Park Loop Road, including the road up Cadillac Mountain, is closed to cars from 1 December to 14 April.

Last checked: 16 October 2026 (US Eastern time). Dates, fees and opening seasons come from the official Acadia National Park website (nps.gov/acad), the Island Explorer operator and the State of Maine. This page is not based on a personal visit. Seasons and fees change, so check the NPS pages linked below before you travel.

Acadia in mid-October 2026: what is open now and what closes soon

If you are planning a trip in the next few weeks, these are the dates that matter. All are from the NPS Operating Hours & Seasons page (updated 27 August 2026) unless another source is named.

Closures and road work to know about

• Ocean Path: the southern section, from a trailhead across from the Otter Point parking lot to the trail’s southern end, has been closed for repairs since 31 August (NPS alert).
• Beech Mountain Loop Trail: the eastern section is closed for repairs from 21 September. NPS lists three other routes to the summit: the outer loop of the Beech Mountain Loop Trail, Beech South Ridge Trail and Beech West Ridge Trail.
• Schoodic Mountain Road: closed for resurfacing from 31 August, from Schoodic Loop Road to the summit of Schoodic Head (NPS alert).
• Seawall Road (Route 102A), Southwest Harbor: the Maine Department of Transportation closed a 0.42-mile section from 5 October for up to 28 days, with work expected to finish by 30 October. Follow the posted detour on the quieter west side of Mount Desert Island.
• No shutdown right now: a stopgap funding law (Public Law 119-103) funds federal agencies, including the Park Service, through 11 December 2026.

Acadia season by season

Temperature ranges are the NPS’s own seasonal figures for Acadia. Crowd notes are from NPS pages, not visitor counts by month.

Rain is frequent in every month, according to the NPS. For snow, the NPS gives two different averages: “about 60 inches” on its FAQ page and 73 inches (185 cm) in its park weather summary. First snowfall usually comes in November.

Best time for fall foliage in Acadia

The NPS says leaves start turning in September and usually peak in mid-October, anywhere from the first to the third week of the month. The State of Maine’s foliage guide puts coastal Maine at the third week of October in a typical year.

In 2026, the Maine Department of Agriculture, Conservation and Forestry’s report for the week of 14 October (which it said “may be our final report of the season”) listed Zone 2, Downeast Maine including Bar Harbor, at peak color with moderate leaf drop. So from mid-October onward, expect color to be fading and leaves falling, especially after wind or rain. For a future trip, aim for the first three weeks of October (the NPS range) and check the Maine foliage reports as your dates approach.

Cadillac Summit Road vehicle reservation

To drive up Cadillac Mountain in season you need a timed vehicle reservation and a park entrance pass. In 2026 reservations were required from Wednesday 20 May to Sunday 25 October; from 26 October you can drive up without one, weather permitting, until the road closes to vehicles on 1 December.

• Cost: $6 per vehicle, sold online only at Recreation.gov, not at the park. Motorcycles, scooters and mopeds each need their own reservation.
• When they go on sale: 30% of sunrise and daytime slots are released at 10 AM Eastern time 90 days ahead, and the other 70% at 10 AM two days ahead.
• Entry windows: sunrise reservations have a 90-minute entry window and daytime reservations a 30-minute window. You can stay until 9 PM, when the road closes to vehicles, but you cannot re-enter on the same reservation.
• Limits: NPS allows one sunrise reservation per seven days and one daytime reservation per day. Vehicles over 21 feet (including bike racks), RVs and trailers are not allowed on the road.
• No bus: the Island Explorer does not go to the summit. Walking, cycling or arriving by taxi does not need a reservation.
• Sunrise time: NPS says sunrise ranges from 4:45 AM in mid-June to 6:15 AM in mid-October.
• 2027: the NPS had not published 2027 reservation dates when this page was checked. The 2026 season was 20 May to 25 October.

Save or print your QR confirmation before you arrive, because NPS says phone signal in the park is unreliable.

Acadia entrance fees and passes (2026)

• Visiting from outside the US? Acadia is one of the 11 national parks on the NPS list that charge the $100 nonresident fee. Our guide to the US national park fee for foreigners explains when the $250 annual pass works out cheaper.
• Bring a card. The Acadia fees page says the park does not accept cash, though a few sales listings on the same page still mention cash. NPS lists third-party sellers, such as the Bar Harbor Chamber of Commerce, for visitors who can only pay cash.
• Fee-free day left in 2026: 11 November (Veterans Day), for US citizens and residents (27 October, Theodore Roosevelt’s birthday, has passed). NPS notes that other fees, such as timed-entry reservations, may still apply.

Island Explorer bus season

The Island Explorer is a fare-free, propane-powered bus network linking the park with Bar Harbor, other Mount Desert Island villages, the Schoodic Peninsula and Bar Harbor–Hancock County Regional Airport. Riders entering the park still need an entrance pass.

• 2026 season (operator, Downeast Transportation): spring service on the Gateway Center, Loop Road and Schoodic routes from 20 May; the other routes from 23 June; fall schedules from 17 August; last day 12 October.
• The bus runs 7 days a week in season, does not serve the Cadillac summit, and carries up to 6 bikes (not e-bikes, fat-tire bikes or tandems).
• Until the buses return in spring, plan on a car, taxi or bike for getting around the park.

Campground seasons (2026)

All sites must be booked in advance at Recreation.gov. For Blackwoods, Seawall and Schoodic Woods, 90% of sites are released six months ahead on the first of each month at 10 AM Eastern, and the other 10% at 10 AM 14 days before arrival. Duck Harbor opens for the whole season at 10 AM on 1 April. There is no backcountry, winter or “out-of-bounds” camping and no overnight parking anywhere in the park. (The individual Blackwoods page still showed 2025 dates when checked, so the dates above are from the 2026 Operating Hours & Seasons page.)

Visiting Acadia in winter

From 1 December to 14 April, weather permitting, only two sections of the Park Loop Road stay open to cars: Ocean Drive, from Schooner Head Road to Otter Cliff Road (one-way along the coast), and the Jordan Pond Road section that leads to the Jordan Pond parking lot. The rest of the loop, including the Cadillac Mountain road, becomes a snowmobile route and is open to walkers, skiers and cyclists. Unpaved park roads close from 15 November to 14 May.

• The 45 miles of carriage roads are open for walking, snowshoeing and cross-country skiing; volunteers groom some sections when snow is deep enough.
• The entrance station on the Park Loop Road at Schooner Head Road is open year-round, and automated fee machines at Hulls Cove Visitor Center and Schoodic take cards 24 hours a day.
• NPS warns that trails are often icy and does not recommend hiking mountain trails in winter. It suggests lower routes such as Ship Harbor, Ocean Path (part of it is closed for repairs in fall 2026) and the carriage roads, with traction devices and trekking poles.

Getting to Acadia

• By car: NPS directions from Boston: I-95 north to Augusta, then Route 3 east to Ellsworth and on to Mount Desert Island. Or stay on I-95 to Bangor and take Route 1A to Ellsworth, then Route 3.
• By air: NPS says Hancock County Airport (Bar Harbor) is 10 miles from the park, with direct flights from Boston, and Bangor International Airport is about an hour away. Both have car rentals.
• Park Loop Road: the 27-mile scenic road starts at Hulls Cove Visitor Center and reaches Sand Beach, Thunder Hole, Otter Cliffs, Jordan Pond and Cadillac Mountain. Low bridges limit tall vehicles: the lowest NPS lists is 10 feet 4 inches at the Stanley Brook entrance.

Tips for planning your dates

• Book the Cadillac reservation first if a sunrise drive matters to you; then buy your entrance pass online and print it, because NPS says you may not get a signal in the park.
• Going in July or August? NPS suggests having a back-up plan if a parking area is full and riding the Island Explorer where you can.
• Going in October? Check the closing dates in the table above. Buses, most campgrounds and food services wind down through the month.
• Pets must be on a leash no longer than 6 feet everywhere in the park.

FAQ

What is the best month to visit Acadia National Park?

September and early to mid-October suit most visitors: most facilities are open, it is outside the July–August peak, and fall color usually peaks in mid-October. July and August have the warmest weather and the full bus network but the heaviest traffic.

When is peak fall foliage in Acadia?

Usually mid-October, anywhere from the first to the third week, according to the NPS. Maine’s 14 October 2026 report listed Downeast Maine, including Bar Harbor, at peak with moderate leaf drop.

Do I need a reservation for Cadillac Mountain in October?

Not after 25 October. In 2026 a $6 vehicle reservation from Recreation.gov was required to drive the Cadillac Summit Road from 20 May to 25 October, in addition to an entrance pass; from 26 October only the entrance pass is needed. NPS had not published 2027 dates when we checked (27 October 2026). No reservation is needed if you walk or cycle up.

Is the Island Explorer bus still running?

No. The 2026 season ended on 12 October, according to the operator’s timetable. Service normally restarts in late spring; in 2026 the first routes started on 20 May.

Is Acadia open in winter?

Yes, the park is open year-round, but from 1 December to 14 April most of the Park Loop Road, including the road to Cadillac Mountain, is closed to vehicles. Campgrounds are closed and winter camping is not allowed.

How much is the Acadia entrance fee?

$35 per private vehicle, $30 per motorcycle or $20 per person on foot or bike, each valid for 7 days. The Acadia Annual Pass is $70. Non-US residents aged 16 and over also pay a $100 nonresident fee unless they have an Annual or America the Beautiful pass.

Sources (checked 16 October 2026, US Eastern time)

• NPS Acadia: Operating Hours & Seasons (updated 27 August 2026), Fees & Passes, Cadillac Summit Road Vehicle Reservations, Current Conditions and alerts, Visiting in Winter, Campgrounds, Island Explorer, Directions, FAQs
• NPS: Entrance fee prices and the nonresident fee list
• Island Explorer (Downeast Transportation): 2026 service calendar
• State of Maine: Maine foliage report, week of 14 October 2026 and foliage FAQ; MaineDOT: Seawall Road closure notice (30 September 2026)
• US Congress: Public Law 119-103 (continuing appropriations through 11 December 2026)

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