Acadia National Park

Hike Double Bubble Nubble Loop with Island Explorer

moderate_strenuous Summit BaggersPhotographersActive Families
6.6 mi Distance
4-5 hours Estimated Time
roundtrip Trail Type

What to Expect

This triple-summit loop is Acadia's best-kept secret for peak-baggers who want views without the single-file shuffle up Cadillac. You'll climb North Bubble first, where the famous Bubble Rock balances impossibly on the cliff edge above Jordan Pond. Drop into the saddle, tag South Bubble for a jaw-dropping look straight down at the pond's crystal-clear water, then push on to Conners Nubble — the quietest summit of the three, where you might actually sit down without someone's trekking pole jabbing your ankle. The terrain alternates between packed dirt through birch-and-spruce forest and honest-to-goodness rock scrambles that require hands-on-granite effort. Each climb is short but steep enough to get your attention. The Island Explorer bus integration is the genius move here — it turns a logistical headache into a one-way traverse. Hikers who love variety, views from multiple angles, and a real sense of accomplishment will be grinning the whole drive back.
Summit BaggersPhotographersActive FamiliesBus HikersView Collectors

Safety Advisory

The granite scrambles on both Bubbles are exposed and become dangerously slippery when wet or icy. After rain, the rock stays slick for hours — if the stone is dark and shiny, take it slow or consider bailing to the carriage roads instead.

South Bubble's summit has steep, unprotected drop-offs on the pond side. Keep dogs leashed and kids close — there are no guardrails, and the slope below the viewpoint is steeper than it looks from the top.

Trail Details

Distance 6.6 miles round-trip
Difficulty moderate_strenuous
Estimated Time 4-5 hours
Trail Type roundtrip
Pets Dogs allowed (leash required)
Season Year-round
Trailhead Hike Double Bubble Nubble Loop with Island Explorer

Pro Tips

Trail Tip

Take the Island Explorer's Jordan Pond stop as your starting point and hike north toward the Bubbles first — the steepest scrambles are better tackled with fresh legs, and you'll beat the late-morning crowds heading up from Bubble Rock parking lot.

Trail Tip

The rock scrambles on South Bubble are slick when wet, so ditch the trail runners and wear boots with actual grip. Trekking poles are more hindrance than help on the granite slabs — stow them for the scramble sections and use your hands.

Trail Tip

Conners Nubble is the sleeper summit on this loop. Almost nobody continues past the Bubbles, so you'll likely have the viewpoint to yourself. The north-facing overlook toward Eagle Lake is one of the best photography angles in the park, especially in late September when the surrounding hardwoods turn.

Photos

Getting There

More Trails in Acadia

Explore Acadia National Park

4 campgrounds, 158 trails, 4.0M annual visitors

View Park Guide