Find out when to hike, drive, and camp along Maine’s rugged coastline.

With more than four million annual visitors, Acadia is one of the country’s most popular national parks.

January is the quietest month, welcoming only about 10,000 to 15,000 people.

Looking down at Echo Lake surrounded by fall foliage. Beech Cliff Loop, Echo Lake; Location: Acadia National Park, Maine

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Trails can become icy, so you shouldcheck park conditionsbefore your day out and dress appropriately for freezing temperatures.

Snowmobiling is allowed on the Park Loop Road and most fire roads.

Volunteers groom portions of the carriage roads and set tracks for cross-country skiing when snowfall exceeds six inches.

Fall colors, mountains, and a sandy beach in Acadia National Park

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This is particularly true for Acadia, where the conditions are constantly changing.

The locals would attest that you should always pack an extra layer even on the hottest summer days.

That said, July and August are the most comfortable in terms of climate.

Thunder hole in Acadia, Park Loop Road, Acadia National Park, Maine

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Besides the entry fee, there’s the cost of accommodations, activities, and dining.

There is no backcountry camping or overnight parking in Acadia.

Unless you’re able to snag a campsite, the most affordable option is to go during the off-season.

Cadillac Mountain with fog and wispy clouds at sunset (golden light, purple skies)

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Parking should be less of an issue in the off-season, however.

Ultimately, the time of day matters more than the time of year when planning your Thunder Hole visit.

Fall is arguably the best time to visit Cadillac Mountain.

But that’s a good thing when you consider how it never feels overcrowded.

you could hike in the winter, but pack proper footwear since ice buildup is common.

Winter is typically the least expensive season, but it’s undoubtedly the most limiting.