Two Summits, One Extraordinary Loop
The Penobscot and Sargent Mountains loop is one of the finest hikes in Acadia National Park and arguably the best way to experience the park’s interior mountain landscape. The 5-mile circuit starting from the Jordan Pond area climbs two of Acadia’s highest summits, Penobscot at 1,194 feet and Sargent at 1,373 feet (the second-highest peak on Mount Desert Island), with long stretches of open granite ridge walking, expansive views over Jordan Pond and the surrounding peaks, and a fraction of the foot traffic that Cadillac Mountain attracts.
What makes this loop special is the quality of above-treeline walking. Both summits are broad, bare granite domes connected by an open ridge. You spend much of the hike on exposed rock with unobstructed views in every direction, a rare feeling in the wooded hills of coastal Maine. The mountains look south and east over Jordan Pond, a glacially carved jewel whose clear waters and symmetrical shape have been the most photographed scene in the park for over a century.
This is a moderate hike by Acadia standards. There are no iron rungs, no ladders, and no extreme exposure. But the 1,350 feet of cumulative elevation gain and the 5-mile distance make it a full morning or afternoon outing. Come prepared with water, food, and layers for the exposed ridgeline.
The Trail
The most popular loop starts from the Jordan Pond area. Park at the Jordan Pond parking lot and follow the Penobscot Mountain Trail, which begins near the north end of the lot. The trail heads north into the forest and climbs steadily through spruce and hardwoods.
After about half a mile, the trail steepens and begins ascending exposed granite slabs. These pink granite faces are the signature terrain of the route. The rock provides excellent friction when dry, and the trail is marked with cairns and blue paint blazes. The slabs are moderately steep, requiring some hand-and-foot scrambling in a few spots, though nothing technical or exposed.
At roughly 1.3 miles, you reach the broad summit of Penobscot Mountain. The top is a wide-open granite platform with views south over Jordan Pond, east toward Cadillac, and west over the park’s interior forests. The Bubbles, two rounded hills at the north end of Jordan Pond, sit directly below.
From Penobscot, the trail descends briefly into a shallow col before climbing again through low scrub to the summit of Sargent Mountain. The ridge connecting the two peaks is largely above treeline, offering continuous views. The ascent to Sargent gains about 200 feet over a mile of gentle ridge walking.
Sargent’s summit at 1,373 feet is the second-highest point on Mount Desert Island. It is even more open than Penobscot, a vast expanse of bare granite with a sense of spaciousness that is unusual for Acadia. On a clear day, the views extend to the Camden Hills to the southwest, Schoodic Peninsula to the east, and inland to the lakes and forests of central Maine.
The descent from Sargent follows the South Ridge Trail or the Sargent South Ridge Trail back down toward Jordan Pond. Several route options exist; the most direct drops steadily through a mix of open ledge and forest back to the pond area. The full loop returns to the Jordan Pond parking area.
Start with Penobscot and finish with Sargent. The climb up Penobscot’s slabs is more interesting as an ascent than a descent, and Sargent’s broad summit is the better place to linger with lunch before the easier walk back down.
What You’ll See
Jordan Pond is the visual anchor of this hike. From both summits, you look directly down at the pond, which fills a glacially carved basin between the mountains. The water is remarkably clear and reflects the surrounding peaks like a mirror on calm mornings. The Bubbles frame the northern end of the pond, and the Jordan Pond House is visible at the southern shore.
The ridge walk between Penobscot and Sargent provides shifting perspectives on Acadia’s interior mountain landscape. To the east, Cadillac Mountain’s long ridge dominates the skyline. To the west, the park’s quieter western mountains, Norumbega, Parkman, and Bald Peak, rise above Eagle Lake. On the clearest days, the ocean is visible in multiple directions, with Frenchman Bay to the northeast and Blue Hill Bay to the southwest.
The open granite is home to low-growing plants that hug the rock: three-toothed cinquefoil, bearberry, blueberry, and various lichens. In late July and August, the blueberry bushes produce abundant fruit right along the trail. Ravens are constant companions on the ridgeline, and red-tailed hawks circle on the thermals above the heated rock. In the forested sections, red squirrels, winter wrens, and black-throated green warblers are common.
The exposed granite ridge between Penobscot and Sargent offers no shelter from weather. Storms can move in quickly, and lightning on the open ridge is a serious hazard. If thunderstorms are forecast, choose a different hike. The granite slabs on Penobscot can be treacherously slippery when wet. In fog, route-finding on the bare rock requires careful attention to cairns and blazes.
When to Go
Spring
Ice lingers on the granite slabs into May. Late May and June offer wildflowers in the lower forest and fewer people on the ridge.
Summer
Dry rock, long days, and ripe blueberries on the ridge in August. Start early to avoid afternoon heat on the exposed granite.
Fall
September and October bring cool hiking weather, stunning foliage in the valleys below, and exceptional visibility. Fewer crowds.
Winter
Experienced winter hikers with microspikes or crampons can traverse the ridge. The granite slabs become dangerously icy. Wind chill on the exposed summit is severe.
Getting There
The Jordan Pond parking area is accessible from the Park Loop Road. From Bar Harbor, enter Acadia via the Park Loop Road and follow signs to Jordan Pond. The parking lot is large but fills by mid-morning in summer.
From Portland, take I-95 to Bangor, then Route 1A to Ellsworth and Route 3 to Mount Desert Island. Follow the Park Loop Road to Jordan Pond. Total drive is about 3 hours and 10 minutes.
The Island Explorer shuttle bus serves the Jordan Pond area during summer and fall, providing car-free access.
Time your hike to finish at the Jordan Pond House for popovers and tea. This has been an Acadia tradition since the late 1800s. The restaurant is a short walk from the trailhead and serves the famous popovers with butter and jam on the lawn overlooking the pond. Make a reservation for busy summer weekends or plan to arrive during a lull.
Packing List
- Hiking boots with good grip for granite slabs
- 1.5-2 liters of water (no water on ridge)
- Lunch or substantial snack for Sargent summit
- Rain jacket and extra layer (ridge is exposed)
- Sunscreen and hat
- Camera for Jordan Pond panoramas
- Trail map of Acadia
- Trekking poles for the descent
- Acadia National Park pass
- Binoculars for long-distance views
FAQ
How long does the Penobscot-Sargent loop take?
Plan for 3.5 to 4.5 hours including time on both summits and a lunch break. Strong hikers can complete it in 3 hours.
Which is harder, Penobscot or Sargent?
The climb up Penobscot is steeper and more demanding, with exposed granite slabs. The walk from Penobscot to Sargent along the ridge is easier, with a gradual ascent. Most of the work is done on Penobscot.
Can I bring my dog?
Yes, dogs are allowed on leash on both the Penobscot and Sargent Mountain trails. The granite slabs can be rough on dog paws, so consider the terrain before bringing your dog.
Is this hike better than Cadillac Mountain?
For the hiking experience, many locals consider it superior to Cadillac. You get more above-treeline walking, two summits, and far fewer people. Cadillac has the sunrise and the auto road, but the Penobscot-Sargent loop is a better hike.
Can I hike just one of the two mountains?
Yes. Penobscot Mountain alone is about 3.2 miles round trip from Jordan Pond. It makes an excellent standalone hike with great views over the pond.
