Bubble Rock, aka the Balance Boulder, is positioned perilously on the southeast corner of South Bubble’s summit in Acadia National Park. It’s a superb example of a glacial erratic, a massive boulder that was carried here by past glaciers’ powerful movements. The rock is thought to have originated 40 miles north in Lucerne. Its coarse-grained white granite differs significantly from the familiar pink granite of Mount Desert Island. Bubble Rock is undoubtedly Maine’s most iconic granite formation. It appears to be perched precariously on a cliff’s brink, ready to tumble at any moment.
The area around Bubble Rock is a beautiful site to photograph and explore, but please exercise caution while visiting with youngsters, as the cliffs are fairly steep and a fall may be fatal. Because this mountain attracts a large number of visitors, please respect any roped-off areas or “do not hike here” signs, which are in place to protect the vegetation.
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- Type: Viewpoint
- Elevation: 768 ft
- Prominence: 126 ft
- Parent mountain: South Bubble
- Easiest trail: Bubble Rock Trail
- Trail distance: 1.2 miles (out and back)
- Trail difficulty: Easy
- Trail popularity: Medium
- Elevation gain: 288 ft
- Estimated hike time: 1 hour
- Address: Park Loop Rd
- Town: Mt Desert
- State: Maine
- GPS: Lat 44.33961 Lng -68.25307
- Parking notes: There is a paved parking lot located just off Park Loop Road at the trailhead. The parking lot holds about 25 cars.
- Parking directions: HERE
- Location directions: HERE