The Quieter Side of Acadia
While most visitors to Acadia National Park flock to Cadillac Mountain and the east side trails, Acadia Mountain sits on the west side of Mount Desert Island, overlooking Somes Sound. This 2.5-mile loop packs real scenery into a short hike. From the summit ridge you look straight down the length of Somes Sound, the only fjord-like inlet on the U.S. Atlantic coast, with the Cranberry Isles and open ocean beyond.
The mountain tops out at just 681 feet, but every foot of elevation counts here. The views from the open summit ledges rival anything else in the park.
The Trail
The loop begins at the Acadia Mountain Trailhead on Route 102, about three miles north of Southwest Harbor. Most hikers go counterclockwise, climbing the east side first. The trail rises steeply through mixed hardwoods and spruce, with some rocky scrambles and stone steps that require hands in a few spots. The grade is steady and the footing demands attention.
After about 0.7 miles, you reach the open summit ridge. The views open up suddenly and completely. Somes Sound stretches below, flanked by Norumbega Mountain to the east and St. Sauveur and Valley Peak to the south. On clear days you can see all the way to the outer islands.
The descent follows the west side of the mountain down to Man O’ War Brook, then loops back along an old fire road to the trailhead. The fire road section is flat and easy, a relaxed finish to a punchy climb.
Summit Views
The summit ridge has several open ledge areas where you can spread out and take in the scenery. Looking east, Somes Sound cuts a deep blue line between the mountains. To the south, the Cranberry Isles dot the horizon. To the west, Echo Lake and Long Pond fill the valley. The combination of ocean, sound, lakes, and mountains in a single panorama is hard to match anywhere in the park.
Catch sunset from the summit. The west-facing ledges make Acadia Mountain one of the best sunset hikes in Acadia. Time your ascent so you reach the top about 30 minutes before sundown, and bring a headlamp for the descent.
When to Go
Spring
Trail can be muddy and slick through May. Peregrine falcon closures may affect nearby trails but not Acadia Mountain itself.
Summer
Long days and warm temps. Start early or hike in the afternoon to avoid midday crowds. Bring water.
Fall
Foliage colors the hardwoods on the lower slopes. Cooler air brings sharp visibility. Peak color is usually early to mid-October.
Winter
Hikeable with microspikes. The exposed rock on the upper trail is slick when icy. Short daylight limits timing.
Fall is the standout season. The hardwoods on the lower slopes turn gold and orange, and the views over Somes Sound gain a richness that summer haze can dull.
Practical Notes
The trailhead parking lot is small and fills early in summer. If it is full, do not park along Route 102. Instead, drive south to the larger Echo Lake Beach parking area and walk back along the road, or time your hike for late afternoon when spots open up.
The park entrance fee applies. Dogs are allowed on leash. There are no restrooms at the trailhead. Cell service is unreliable on the mountain but generally available at the trailhead.
Packing List
Acadia Mountain Day Hike
- 1 to 1.5 liters of water per person
- Sturdy shoes with good grip for rock scrambles
- Headlamp if hiking for sunset
- Light wind layer for the exposed summit
- Camera
- Park pass or entrance fee
Getting There
The Acadia Mountain Trailhead is on Route 102, about three miles north of Southwest Harbor and roughly 11 miles southwest of Bar Harbor. The small parking lot is on the east side of the road. From Bangor, the drive takes about 1 hour 15 minutes. From Portland, allow about 3 hours 15 minutes.
FAQ
How long does the Acadia Mountain hike take?
Most hikers complete the 2.5-mile loop in 1.5 to 2.5 hours, depending on how long they spend on the summit.
Is Acadia Mountain good for kids?
Older kids who are comfortable with rocky scrambles will enjoy it. The upper trail has steep sections that require hands. It is not ideal for very young children.
Are dogs allowed on Acadia Mountain?
Yes, dogs are allowed on leash. The rocky scrambles on the upper trail can be difficult for some dogs.
Can I see the ocean from the summit?
Yes. The summit ridge has clear views over Somes Sound to the Cranberry Isles and the open Atlantic beyond.
Is there a fee to hike Acadia Mountain?
Yes, the standard Acadia National Park entrance fee applies. An annual park pass or America the Beautiful pass covers it.
