Hiking Cadillac Mountain: The South Ridge Trail Guide
3.5 miles of open ridgeline to Acadia's highest summit
Cadillac Mountain can be driven, biked, or hiked — but only one of those methods earns the view. The South Ridge Trail gives you 3.5 miles of ascending ridgeline, transitioning from forest to open heath to exposed granite, with Atlantic views opening wider with every step. The summit crowds from car visitors are a stark contrast to the solitude of the lower ridge.
At 1,530 feet, Cadillac is the highest point on the US Atlantic seaboard north of Rio de Janeiro. In fall and winter, it is the first place in the continental United States to see sunrise — a fact that draws hundreds of people to the summit road on autumn mornings. Hikers on the South Ridge, arriving quietly from below, are usually alone.
The ridge is exposed to weather for most of its length. Wind is a constant; hypothermia is a real risk even in summer if conditions change. Carry layers regardless of the forecast, and check summit conditions on weather.gov before departure.
The timed entry permit required for the Cadillac Summit Road does not apply to hikers. Park at the Blackwoods Campground trailhead or take the Island Explorer (Route 4 stops at Blackwoods).
Key Waypoints
- 1
Trailhead Register
0.0 mi from start · 100ft elevation
Sign in. The trail begins in mixed forest — this section is the most sheltered on the route.
- 2
Treeline Transition
1.5 mi from start · 700ft elevation
The forest opens here to heath and low-lying shrubs. Views begin. This is where exposure to weather becomes a factor — assess conditions.
- 3
Upper Ridge
2.5 mi from start · 1,200ft elevation
Fully exposed granite ridge. Views in all directions. The summit is visible ahead. Wind is often strongest here.
- 4
Cadillac Summit
3.5 mi from start · 1,530ft elevation
The highest point on the US Atlantic seaboard north of Brazil. The gift shop and paved trail are here — the summit road visitors will be present. Views extend to the Camden Hills, 40 miles north.
Seasonal Notes
Cadillac summit is frequently in cloud, especially in morning. Check conditions before going — what starts as clear at the trailhead can be zero-visibility at the top. The South Ridge is exposed to wind year-round; summer temperatures can drop 20°F between the trailhead and summit. Snow on the upper ridge is common from November through April.
Conservation Note
The summit's heath tundra is extremely fragile — plants that form the low-lying carpet took decades to establish. Stay on designated rock surfaces and marked trails. A single footstep off-trail can kill plants that won't recover for years.