A Boston to Acadia National Park road trip covers roughly 280 miles and takes about 4.5 to 5.5 hours of driving without major stops, which is why it is worth planning as a day each way rather than a transfer. The route is almost all highway: I-93 to I-95 North through New Hampshire and Maine, around Portland on the turnpike or I-295, on to Bangor, then I-395 and Route 1 to Ellsworth, and Route 3 onto Mount Desert Island and into Bar Harbor.
How far is Acadia from Boston, and how long does it take?
It's about 280 miles door-to-door from Boston to Bar Harbor with a realistic drive time of 4.5 to 5.5 hours depending on traffic. Leave Boston at 6 a.m. on a weekday and you'll cruise; leave Friday afternoon in July and the Portland-area stretch can crawl. The last 45 minutes from Ellsworth onto Mount Desert Island is two-lane Route 3 and bottlenecks badly in summer, so budget extra time once you cross onto the island.
What's the best route from Boston to Acadia?
There's essentially one sensible route, and it's almost all highway:
- Boston to Portsmouth, NH: I-93 N to I-95 N. About an hour. You'll pass the Hampton, NH toll (cash or E-ZPass).
- Portsmouth into Maine: Cross the Piscataqua River bridge into Maine, where I-95 becomes the tolled Maine Turnpike. Around Portland, you can stay on the Turnpike or take I-295 through the city; I-295 is toll-free and often faster, reconnecting with I-95 near Gardiner.
- Through central Maine: Continue on I-95 N past Augusta toward Bangor, the long, plain middle of the drive, roughly 130 miles of trees.
- Bangor to the coast: Take I-395 to Route 1A, then Route 1 to Ellsworth, then Route 3 south across the bridge onto Mount Desert Island and into Bar Harbor.
Maine Turnpike tolls run a few dollars depending on your exact path, and you skip most of them by routing through Portland on I-295. Gas is usually cheaper in New Hampshire than Maine, so I top off near Portsmouth.
Worthwhile stops along the way
The drive is long and the middle is monotonous, so a stop keeps everyone sane:
- Portland, Maine (~2 hrs in): The Old Port for lobster rolls, coffee, and a leg stretch. My default break point.
- Freeport (~2 hrs 15 min): Home of the L.L.Bean flagship store, open 24 hours, with the giant boot out front. Good bathroom-and-stretch stop.
- Augusta (~3 hrs): Maine's capital, fine for a quick food stop off I-95.
- Ellsworth (~4 hrs): The last town with full-size grocery stores (Hannaford, Walmart) before the island. Stock up here, island prices are higher and stores are smaller.
Do you need to pay to enter Acadia?
Yes. As of 2026, a 7-day private vehicle pass is $35and an annual America the Beautiful pass is $80 (worth it if you're hitting other federal parks the same year). Buy it at the Hulls Cove Visitor Center, at fee stations, or ahead of time on recreation.gov, I recommend online to skip the line.
If you want to drive up Cadillac Mountainyou also need a separate timed vehicle reservation ($6) on recreation.gov. Reservations are required May 20 through October 25, and they sell out, especially the sunrise slots, since Cadillac is one of the first places in the U.S. to see the sunrise. Sunset slots are easier to grab and just as scenic. Book the moment your date opens in the rolling reservation window.
Getting around the park: the Island Explorer shuttle
The free Island Explorer shuttle connects Bar Harbor, campgrounds, and major trailheads. In 2026, limited spring routes start around May 20 and full service runs roughly late June through mid-October. Parking at popular spots like Sand Beach, Jordan Pond, and the Bubbles fills by mid-morning in summer, so I leave the car and ride the shuttle on busy days. The Park Loop Road is the scenic 27-mile artery, much of it is one-way, so plan your direction.
Best trails once you arrive
After several hours in the car, here's where I'd actually point you. Acadia's signature is granite, exposed ridges, and historic iron-rung "ladder" trails:
- Ocean Path~2.2 miles each way (about 4.4 round trip), flat, along the coast from Sand Beach past Thunder Hole to Otter Point. Easy, flat, and the best first evening walk on the island.
- The Beehive~1.5 miles round trip, ~500 ft gain. A short but genuinely exposed iron-rung climb with drop-offs. Not for anyone afraid of heights, and don't descend the rungs (it's a loop; come down the back). One of my favorites.
- Jordan Pond Path~3.3 miles, flat loop around the pond with the iconic Bubbles view. Finish with popovers at Jordan Pond House.
- Precipice Trail~2.5-mile loop, ~1,000 ft gain, the most serious ladder climb. Typically closed mid-March through mid-August for peregrine falcon nesting, check the latest status at the visitor center.
- Cadillac South Ridge~7 miles round trip if you'd rather earn the summit than drive it.
When should you make this drive?
Acadia is busiest mid-June through mid-October. Peak foliage hits roughly the first three weeks of October, spectacular but crowded, so book lodging months out. Late September is my sweet spot: warm enough, fewer people, shuttle still running. Cadillac Summit Road vehicle reservations run May 20–October 25, and much of the Park Loop Road and seasonal facilities close to vehicles in late fall, reopening in spring. In winter you can still visit, but expect snow-covered carriage roads, limited services, and Cadillac's summit road gated shut.
Honest practical tips
- Leave early. A pre-7 a.m. Boston departure saves you the worst Portland-area traffic and gets you a parking spot at popular trailheads.
- Fuel and groceries in Ellsworth. Bar Harbor has stores, but they're pricier and smaller.
- Reserve Cadillac and lodging early. Both sell out in summer. Campgrounds (Blackwoods, Seawall) book months ahead on recreation.gov.
- Cell service is spotty on the carriage roads and back trails, download offline maps before you lose signal past Bangor.
- Don't try to "do" Acadia in a day from Boston. It's roughly a 9-to-11-hour round trip of driving. Give it at least two nights.
The middle of this drive is dull, I won't pretend otherwise, but the moment Route 3 crosses onto Mount Desert Island and you smell the spruce and saltwater, it earns itself. Plan the logistics, leave early, and you can be standing on pink granite above the Atlantic by early afternoon.
What to Do Once You Arrive
Give it at least two nights, and three is better. Our Acadia National Park 3 day itinerary picks up exactly where this drive ends, with a day-by-day plan for Mount Desert Island, every stop pinned to a map, and a step-by-step guide to booking a Bar Harbor room on an island that sells out months ahead.
Boston to Acadia National Park Road Trip: Route and Stops FAQs
About 4.5 to 5.5 hours covering roughly 280 miles. Allow extra time in summer, since the final stretch on Route 3 onto Mount Desert Island bottlenecks during peak season.
Take I-93 to I-95 North through New Hampshire and Maine, optionally use toll-free I-295 through Portland, continue on I-95 to Bangor, then I-395 to Route 1 to Ellsworth and Route 3 south onto Mount Desert Island.
As of 2026, a 7-day private vehicle pass is $35 and an annual America the Beautiful pass is $80. Driving up Cadillac Mountain requires a separate $6 vehicle reservation booked on recreation.gov.
Yes. A timed vehicle reservation ($6) is required to drive Cadillac Summit Road from May 20 through October 25, booked on recreation.gov. Sunrise slots sell out fast; sunset slots are easier and just as scenic.
You can, but it's roughly 9 to 11 hours of round-trip driving, leaving little time in the park. I strongly recommend at least two nights in or near Bar Harbor to make the trip worthwhile.
Late September offers warm weather and thinner crowds. Early October brings peak foliage but heavy crowds and booked-out lodging. Much of the Park Loop Road and seasonal services close in late fall and reopen in spring.
