Maine Park Road Opening Dates

Name: Seasonal road and facility opening dates for national parks in Maine
Creator: National Park Service
License: https://www.usa.gov/government-works

Maine is one of the states where the parks publish their dates in advance, so there is something real to plan against. Below: the normal season for every road, entrance, campground and visitor centre the parks here publish one for, drawn on a single calendar; the years of actual opening dates where a park keeps that record; and the link to the page where the park posts today. Every date carries the park's own last-updated stamp, read on 3 September 2026.

Park Loop Road and the Cadillac Summit Road normally opens mid April, and the park will not put a date on it any tighter than that

Parks with a season

Roads and facilities

Open year round

What sets the dates

a published schedule

Maine, in one paragraph

Park Loop Road and the Cadillac Summit Road normally opens mid April.

Closed by rule from 1 December to 14 April, with the actual spring opening weather dependent. Maine closes its park road by the calendar rather than by the snow. Acadia shuts the Park Loop Road and the Cadillac Summit Road from 1 December to 14 April every year, and its unpaved roads from 15 November to 14 May, so the dates are known a year ahead and only the spring reopening moves with the weather.

15 April

Where the normal season starts on the calendar below

30 November

And where it normally ends

Seasonal entries in Maine

Open all year, weather permitting

That season is Acadia National Park's own description, from a page the park stamps last updated May 19, 2025.

The visual answer

Everything seasonal in Maine, on one calendar

Check the park’s own page before you drive. Seasonal roads open when the plows get through and close again for storms, rockfall and fire, sometimes within the same week. What you get here is the normal season for each road and facility in the park’s own words, the years of actual opening dates the parks publish, and a link to the page where that park posts today. Every date on this page shows the park’s own last-updated stamp rather than ours.

Park Loop Road and the Cadillac Summit RoadAcadia

15 April to 30 November

The park’s unpaved roadsAcadia

15 May to 14 November

The two year round sections of Park Loop RoadAcadia

Open year round, weather permitting

Opens on plowing progress
Park published dates
Fixed by rule each year
Open year round, storm closures

Every road, entrance, campground and visitor centre in Maine with a published season, ordered by when it normally opens. Bars are the park's own description, not a status and not a forecast. The colour says what governs the date.

“The Park Loop Road closes annually, from Dec 1 through April 14, with spring road opening being weather-dependent. Most of the Park Loop Road, including the road to Cadillac Mountain, is closed to motor vehicle traffic in winter.”

Acadia National Park, Directions and Transportation

National Park Service, public domain. That page carries the park’s own stamp: last updated May 19, 2025.

Acadia National Park

3 seasonal entries on this page

Park Loop Road and the Cadillac Summit Road. Normally from mid April
The park’s unpaved roads. Normally from mid May
The two year round sections of Park Loop Road. Year round

A loader carrying a bucket of snow down Going-to-the-Sun Road below Logan Pass, with snowfields on both sides of the road — A loader clearing the last of the snow off Going-to-the-Sun Road below Logan Pass. Every seasonal park road in the country opens like this: not on a date, but on the afternoon a machine finishes. “Snowplows at Logan Pass (52201734565)” — GlacierNPS — Public domain

Everything, with its source

3 Maine park seasons, and where each one comes from

The last column is the one nobody else shows you: the date the park itself last touched the page each season came from. Read a two-year-old stamp as the park saying nothing has changed, and a stamp from last month as the park saying something has.

Every seasonal road, entrance, campground and visitor centre in Maine, ordered by when it normally opens. Each season is the park's own description from the park's own page. None of these is a current status.
Road or facility	Park	Normal season	What sets the date	Park last updated
Park Loop Road and the Cadillac Summit Road1,530 ft	Acadia	closed by rule from 1 December to 14 April, with the actual spring opening weather dependent	Fixed by rule	May 19, 2025
The park’s unpaved roads	Acadia	closed annually from 15 November through 14 May	Fixed by rule	May 19, 2025
The two year round sections of Park Loop Road	Acadia	two short sections stay open all year, which is why Acadia is never entirely shut	Fixed by rule	May 19, 2025

Roads and facilities with a season

Of 3 covered in Maine

Where a plow crew sets the date

The date moves with the snowpack

Where the park publishes dates

A schedule or a standing rule

Open all year

Storm closures rather than a season

Where today’s answer lives

Acadia publishes its own status

Nothing on this site knows what a road is doing this afternoon, and nothing on this site pretends to. Each block below is the park’s own page, with what it carries and the caveats that go with it.

Today’s Acadia road status

Acadia National Park current conditions

Published by Acadia National Park. It carries the detailed facility opening and closing list plus the storm damage closures still standing from the January 2024 winter storms.

A park road status is rewritten by rangers and road crews inside a day, sometimes inside an hour. Glacier National Park says it about its own map: “This report contains the most recent information available for road, hiker/biker, and entrance closures as well as snowplow status. It may be outdated and inaccurate as our information can change quickly.”

An opening date is the park’s current expectation of when a plow crew will finish or a gate will be unlocked. It is not a promise, it is not a booking, and the parks revise it through the spring as the snow tells them to.

And an open road closes again. Snow falls on high passes in June and September, rockfall shuts a road in an afternoon, wildfire shuts one for a month, and avalanche control closes them on purpose. Glacier’s own record has Logan Pass opening on 21 June 1995 and shut by a rockslide two days later, and opening on 24 May 1980 and closed the next day until 6 June. The link above is the only thing that knows which of those days you are looking at.

Link check: read in a browser on 3 September 2026 and it answered with a page titled for Acadia National Park. The park's own stamp on it that day read: last updated August 17, 2026. If it has moved since, Acadia National Park is the authority and its own site search is the fastest way back to it.

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Common questions

Maine park opening FAQ

Is Park Loop Road and the Cadillac Summit Road open right now?

Acadia National Park publishes that itself at Acadia National Park current conditions, which carries the detailed facility opening and closing list plus the storm damage closures still standing from the January 2024 winter storms. A road status is rewritten by rangers and road crews inside a day, and Glacier National Park puts it plainly about its own status map: "This report contains the most recent information available for road, hiker/biker, and entrance closures as well as snowplow status. It may be outdated and inaccurate as our information can change quickly." What this page adds is the normal season for every road and facility in Maine, the years of actual opening dates where the park publishes them, and the link to the page that has today.

When does Park Loop Road and the Cadillac Summit Road usually open?

What actually closes in Maine, and what stays open?

3 road, entrance, campground and visitor centre seasons are covered on this page, across 1 park: Acadia National Park. 1 of them are open year round and the rest have a season. Maine closes its park road by the calendar rather than by the snow. Acadia shuts the Park Loop Road and the Cadillac Summit Road from 1 December to 14 April every year, and its unpaved roads from 15 November to 14 May, so the dates are known a year ahead and only the spring reopening moves with the weather.

Can a Maine park road close again after it opens?

Yes, and several Maine roads do every year. An opening is the park saying the road was passable that day, not that it will stay passable. Snow falls on high passes in June and September, rockfall closes a road without warning, and wildfire closes one for weeks. Glacier National Park's own published record shows Logan Pass opening on 21 June 1995 and shutting after a rockslide two days later, and opening on 24 May 1980 and closing the next day in bad weather until 6 June. Only Acadia National Park's own status page can tell you which kind of day today is in Maine, and the link is above.

Keep going

The rest of the Maine season

Snow depth near MaineThe snowpack these dates turn on, from SNOTEL and NOHRSC. Nothing opens until it goes.Avalanche dangerWhat the avalanche centres are publishing for the terrain above these roads, which is what the plow crews read before they start.Ski season datesThe other side of the same snowpack: when the lifts open and close, resort by resort.

Park openings in nearby states

Every state with a park season

Every season and quotation on this page comes from a National Park Service page on www.nps.gov, read at build time on 3 September 2026 and shown with the park’s own last updated stamp rather than ours. NPS material is a work of the United States government and is in the public domain. Maine is one of 8 states where the parks publish their dates in advance. In Glacier National Park’s words about its own status map: “This report contains the most recent information available for road, hiker/biker, and entrance closures as well as snowplow status. It may be outdated and inaccurate as our information can change quickly.” National picture: park road opening dates in every state