How Tall Is the Tallest Mountain in Maine?
The tallest mountain in Maine is Mount Katahdin, whose summit, Baxter Peak, rises to 5,269 feet. Katahdin sits inside Baxter State Park in north-central Maine, near the town of Millinocket, and it is the crown jewel of the state's high country. The name comes from the Penobscot word meaning the greatest mountain, and almost everyone who hikes it agrees the name fits. Katahdin is also the northern terminus of the Appalachian Trail, so for thru-hikers it is the dramatic finish line after 2,190 miles.
Because the mountain stands alone above the surrounding lowlands, the summit views stretch across an endless quilt of lakes, ponds, and forest. On a clear day you can see deep into the wilderness that the 100-Mile Wilderness backpacking route crosses to reach this very peak.
The Best Trails Up Mount Katahdin
There is no easy way up Katahdin, but there are several classic routes, each with its own character. Most day hikers start from the Roaring Brook or Katahdin Stream campgrounds.
- Hunt Trail: The final stretch of the Appalachian Trail, starting at Katahdin Stream Campground. It climbs roughly 5.2 miles one way and includes iron rebar handholds bolted into the boulders above tree line.
- Abol Trail: The shortest and steepest route, following an old rockslide. It is fast but punishing, and a favorite of strong hikers wanting a quick summit.
- Saddle Trail: The gentlest grade to the top, reached from Chimney Pond. It crosses a loose scree slope before opening onto the Tableland plateau.
- Cathedral Trail: A rugged, hands-on scramble up a series of rock buttresses, recommended for ascent only.
The Knife Edge: Maine's Most Famous Ridge
No discussion of Katahdin is complete without the Knife Edge, the narrow arete connecting Baxter Peak to Pamola Peak. In places the trail is barely three feet wide with sheer drops on both sides. It is one of the most exposed maintained trails in the eastern United States, and it should only be attempted in calm, clear weather by hikers comfortable with heights and scrambling. When clouds, wind, or rain move in, rangers urge hikers to avoid it entirely. The traverse takes most people one to two hours to cover its roughly 1.1 miles, but the views down into the South Basin and across the surrounding ponds are unforgettable.
Permits, Parking, and Reservations
Baxter State Park limits the number of vehicles allowed in each day, and the trailhead parking lots fill quickly in summer. Day-use parking reservations are strongly recommended and can be booked in advance through the park. There is also a per-vehicle entry fee for out-of-state cars. If you are thru-hiking the Appalachian Trail, you will register through The Birches long-distance hiker site near Katahdin Stream. Plan to arrive early, because once the lots are full, late arrivals are turned away.
Best Time to Climb Katahdin
The prime hiking window runs from late June through early October, with July and August offering the most reliable weather above tree line. Even in midsummer, the summit can be 20 degrees colder than the trailhead, with sudden wind and fog, so pack layers, gloves, and a hat. Fall brings spectacular foliage in late September but also colder nights and shorter days. The mountain is officially closed to above-tree-line hiking in winter except for experienced, registered mountaineers. Always start early, because Baxter requires hikers to be below tree line before dark.
Making Katahdin the Finale of a Bigger Adventure
For many hikers, summiting Katahdin as a standalone day trip is the goal. But the most meaningful way to stand on Baxter Peak is to earn it across days of remote wilderness travel. The classic approach is to walk the entire 100-Mile Wilderness from Monson, ford its rivers, camp beside its quiet ponds, and arrive at Abol Bridge with the great mountain finally in view. If that sounds like your kind of trip, our 7-day 100-Mile Wilderness itinerary maps out the route day by day, ending with the climb up the tallest mountain in Maine.
