International Appalachian Trail: Maine Hiking Guide

Official app of the International Appalachian Trail. The Maine section of the IAT/SIA is about 138mi/222km long and begins on the Katahdin Loop in the Katahdin Woods & Waters National Monument east of Baxter State Park. The trail generally follows the East Branch of the Penobscot River north through the Monument, before turning east towards Mount Chase and, eventually, Houlton. Just before Houlton, the trail turns north again and continues to and across Mars Hill Mountain in Aroostook County. It then follows the United States/Canadian international border northward to Fort Fairfield where it crosses into Perth-Andover, New Brunswick.