The famous, long-established National Scenic Appalachian Trail (AT) in the United States extends from Georgia to Mount Katahdin in Maine’s Baxter State Park.
In Maine, the IAT/SIA starts at the trailhead of the Katahdin Lake East entrance of Baxter Park, heads northeast toward of Mount Chase, and continues north to Mars Hill Mountain in Aroostook County. It follows the United States/Canadian international border northward to Fort Fairfield where it crosses into Perth-Andover, New Brunswick.
In New Brunswick, the trail accompanies the Tobique River through the village of Plaster Rock to Mount Carleton and on to St. Quentin, Kedgewick and the Upsalquitch Valley, crossing the Restigouche River into Québec at Flatlands, New Brunswick. In Québec, the trail leaves Matapedia and proceeds to Amqui then through the Reserve Faunique de Matane to Mount Logan in the western portion of the Parc de la Gaspésie. The trail then turns eastward to Mont Albert, Mont Jacques Cartier, and the legendary cliffs of Cap Gaspé in Forillon National Park.
After crossing the Gulf of St. Lawrence by ferry, hikers begin the Newfoundland and Labrador section of the IAT/SIA at Port Aux Basques and continue northward to Corner Brook, Cape Bauld. The trail route connects two countries, three provinces, one state, the English, French and Celtic cultures of North America, and some of the area’s most spectacular landscapes. Bus and train transportation is available from the city of Gaspé to all points in Nova Scotia including the North Sidney Ferry terminal.
The Appalachian Mountains of North America lie between Flagg Mountain, Alabama, USA and the north end of Belle Isle in the Province of Newfoundland and Labrador, Canada. The Appalachian terrain continues as the Caledonides of Ireland and Scotland and terrains of western Europe and North Africa.
The Maine section of the IAT/SIA is 138.4 miles (223kms) long. Heading north from the trail head parking near mile 12 on the Katahdin Loop Road, the route passes through boreal forests and follows trails, old logging roads, an abandoned railroad bed, and rural public roads to the potato fields of Aroostook County. Beyond Fort Fairfield, the trail enters New Brunswick.