Acadia Mountain Trailhead

Acadia Mountain Trailhead overlook in Acadia National Park showcases rugged granite ledges, pine forest, and sweeping coastal views.

Acadia Mountain Trailhead demands grit. The route climbs steeply with rock scrambling and exposed ledges, pushing you to your limit. Expect 1.5–2.5 hours for the loop (about 0.8–1 hour for the out-and-back); carry ample water since there are no reliable sources on the trail. The payoff is expansive views of Somes Sound, Echo Lake, and the Atlantic, earned through a hard ascent and steady focus.

Quick facts

Distance Miles: 1.7
Route Type: Out-and-back with loop options via Man O' War Brook Trail or St. Sauveur Mountain Trail
Difficulty Level: Moderate to Hard/Advanced
Elevation Gain Feet: 985

Trail profile

Distance Miles: 1.7
Route Type: Out-and-back with loop options via Man O' War Brook Trail or St. Sauveur Mountain Trail
Difficulty Level: Moderate to Hard/Advanced
Elevation Gain Feet: 985
Estimated Time: 1.5–2.5 hours for the loop; ~0.85 hours (about 51 minutes) for the out-and-back
Trail Surface: Forest floor, rocky ledges, stone staircases, and boulder fields
Trail Features: Rock scrambling sections
Rocky ledges
Stone staircases
Boulder fields
Exposed summit leading to broad views
Trail Highlights: Panoramic views from the summit over Somes Sound, the Atlantic Ocean, Echo Lake, and surrounding peaks

Trailhead & access

Trailhead Location: Maine Route 102, across from Echo Lake; ~3 miles south of Somesville; GPS 44.321586, -68.332828
Parking Lot Size: Small, roadside pull-off parking
Parking Fill Time: Parking fills quickly in peak season; arrive early morning or late evening
Shuttle Required: 0
Shuttle Details: Free Island Explorer Shuttle stops at the trailhead; Acadia National Park pass required to ride

Permits & conditions

Permits Required: Yes
Permit Details: Park entrance pass required May 1–Oct 31; purchase in advance or at entrance; America the Beautiful Pass accepted
Fees: Varies
Trail Status: Open
Seasonal Closures: Snow can linger into late spring; higher elevations may be impassable until July; mud season in spring; mosquitoes/black flies May–June

Facilities & rules

Restrooms At Trailhead: 1
Water Sources: No reliable water sources on the trail; carry all necessary water
Accessibility: Not available

Safety & strategy

Hazards: Slippery rocks when wet
Steep drop-offs
Fog can obscure views and disorient
Rock scrambling sections requiring hands-on movement
Very steep eastern descent with grades up to 90%
Hazard Details: Slippery surfaces when wet; exposed ledges with steep drops; fog can reduce visibility; scrambling demands grip and balance; eastern descent is rugged and extremely steep in spots
Cell Service: Spotty
Crowd Level: Very busy during peak season and weekends
Peak Crowd Times: Peak season weekends; arrive early or late to avoid congestion
Best Season: Summer through Fall
Best Time To Visit: Start by 7-8 AM to secure parking and beat crowds. Summer through Fall offer the most reliable weather and trail openings. The Island Explorer Shuttle stops at the trailhead; a park pass is required May 1–Oct 31.
Tips Advice: Tighten your boots and wear ankle-supporting shoes.
Carry at least 2 liters of water; no reliable water sources.
Loop clockwise: start on Man O' War Brook Fire Road to ascend the west side, then descend the steeper east side for relief.
Dress in layers; sun exposure is real on exposed rock.
Trekking poles help stability; a headlamp is prudent for descent if hiking near sunset.

More details

Park Area: Acadia National Park, Maine
Trail Markers: Well-worn in sections; carry a map
Dogs Allowed: Not available
Biking Allowed: Not available
Shade Level: Canopy sections in forest; summit and exposed rock are sun-exposed
Emergency Contacts: Not available
Map Recommended: 1
Alltrails Link: www.alltrails.com
Snow Dates: Snow can linger into late spring; impassable on higher trails until July
Mud Season: Spring (April-June) mud with lingering snowmelt
Wildflower Peak: Not available
Fall Colors Peak: September-October
Bug Season: Mosquitoes and black flies intense mid-May to mid-June
Insider Tips: Loop clockwise: start on Man O' War Brook Fire Road and climb the west side, then descend the steeper east side for relief.
Arrive by 7–8 AM to secure parking and beat the crowds.
Not ideal for very young children due to scrambling; consider easier options.
Recent Updates: Not available
Family Friendly Notes: Not ideal for very young children due to steep sections and scrambling
Nearby Facilities: Restrooms at trailhead; Echo Lake area facilities nearby
Review Summary: Hikers describe a demanding climb with solid uphill grind and scramble; the ascent challenges you, but the summit rewards with expansive views of Somes Sound and the Atlantic. Crowds and parking can be a constraint, but the trail remains well-maintained and worth the effort.

Location

Photos

Acadia Mountain Trailhead in Acadia National Park features rugged granite ledges and forested views along a rocky trail.

Acadia Mountain Trailhead sign at a rocky overlook with spruce trees in Acadia National Park.

Acadia Mountain Trailhead overlook captures rugged coastline and blue waters in Acadia National Park.

Acadia Mountain Trailhead winds through a dense pine forest toward rugged coastal views in Acadia National Park, Maine.

Frequently asked questions

Is a park entrance pass required for this hike?

Yes. A park entrance pass is required May 1–October 31; you can purchase in advance or at the entrance. America the Beautiful Pass is accepted.

Are bears common on this trail?

Black bears are present in Acadia National Park, though encounters are rare.

What gear should I bring for Acadia Mountain Trail?

Sturdy hiking shoes with ankle support, layered clothing, a wind shell, 2 liters of water, a map or GPS, trekking poles if you like them, and a headlamp if you’ll descend near sunset.

Is this hike suitable for kids or beginners?

Due to steep sections and scrambling, it’s not ideal for very young children or hikers with a fear of heights.

Can I do a shorter outing or must I do the loop?

You can opt for the out-and-back (about 1.7 miles total) or complete the loop (2.5–3.0 miles) depending on conditions and your grit.